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<title>BMW M21</title>
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<meta name="wx_pagename" content="BMW_M21"/>
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<wx:section level="1" title="BMW M21" id="wxsec1"><h1 class="pagetitle" id="wx1">BMW M21</h1>

<p id="wx2">Con la sigla <b id="wx3">M21</b> si intende un <a href="/wit/Motore_diesel" title="Motore diesel" wx:linktype="known" wx:pagename="Motore_diesel" wx:page_id="1569874" id="wx4">motore diesel</a> per uso automobilistico prodotto dal <a href="/wit/1983" title="1983" wx:linktype="known" wx:pagename="1983" wx:page_id="4702" id="wx5">1983</a> al <a href="/wit/1994" title="1994" wx:linktype="known" wx:pagename="1994" wx:page_id="1036151" id="wx6">1994</a> dalla <a href="/wit/Casa_automobilistica" title="Casa automobilistica" wx:linktype="known" wx:pagename="Casa_automobilistica" wx:page_id="522353" id="wx7">Casa automobilistica</a> <a href="/wit/Germania" title="Germania" wx:linktype="known" wx:pagename="Germania" wx:page_id="1616657" id="wx8">tedesca</a> <a href="/wit/BMW" title="BMW" wx:linktype="known" wx:pagename="BMW" wx:page_id="58316" id="wx9">BMW</a>.</p>

<div id="wx_toc"/>

<a id="Descrizione" name="Descrizione"/>
<wx:section level="2" title="Descrizione" id="wxsec2"><h2 id="wx10">Descrizione</h2>

<p id="wx11">Si tratta tra l'altro del primo propulsore a <a href="/wit/Gasolio" title="Gasolio" wx:linktype="known" wx:pagename="Gasolio" wx:page_id="90097" id="wx12">gasolio</a> prodotto dalla Casa <a href="/wit/Baviera" title="Baviera" wx:linktype="known" wx:pagename="Baviera" wx:page_id="18197" id="wx13">bavarese</a>. Le basi di partenza per realizzare quest'unità motrice furono i motori a <a href="/wit/Benzina" title="Benzina" wx:linktype="known" wx:pagename="Benzina" wx:page_id="90092" id="wx14">benzina</a> da 2 e da 2.5 litri della famiglia <a href="/wit/BMW_M20" title="BMW M20" wx:linktype="known" wx:pagename="BMW_M20" wx:page_id="1620513" id="wx15">M20</a>: dal primo furono ripresi i <a href="/wit/Cilindro_%28meccanica%29" title="Cilindro (meccanica)" wx:linktype="known" wx:pagename="Cilindro_(meccanica)" wx:page_id="308074" id="wx16">cilindri</a> ed i pistoni, mentre dal secondo vennero riprese le bielle, in modo da tale da ottenere un'unità dall'<a href="/wit/Alesaggio" title="Alesaggio" wx:linktype="known" wx:pagename="Alesaggio" wx:page_id="459808" id="wx17">alesaggio</a> pari ad 80 <a href="/wit/Millimetro" title="Millimetro" wx:linktype="known" wx:pagename="Millimetro" wx:page_id="48588" id="wx18">mm</a>, come nel 2 litri, e dalla <a href="/wit/Corsa_%28meccanica%29" title="Corsa (meccanica)" wx:linktype="known" wx:pagename="Corsa_(meccanica)" wx:page_id="466575" id="wx19">corsa</a> di 81 mm, come nell'unità da 2.5 litri. Il risultato fu un 6 cilindri da 2443 <a href="/wit/Centimetro_cubo" title="Centimetro cubo" wx:linktype="known" wx:pagename="Centimetro_cubo" wx:page_id="68158" id="wx20">cc</a>, disponibile sia aspirato che sovralimentato.</p>

<a id="M21D25" name="M21D25"/>
<wx:section level="3" title="M21D25" id="wxsec4"><h3 id="wx21">M21D25</h3>

<p id="wx22">E' la versione aspirata del 2.4 litri BMW: erogava una <a href="/wit/Potenza_%28fisica%29" title="Potenza (fisica)" wx:linktype="known" wx:pagename="Potenza_(fisica)" wx:page_id="83189" id="wx23">potenza</a> massima di 86 <a href="/wit/Cavallo_vapore" title="Cavallo vapore" wx:linktype="known" wx:pagename="Cavallo_vapore" wx:page_id="54149" id="wx24">CV</a> a 4600 giri/min ed una <a href="/wit/Coppia_motrice" title="Coppia motrice" wx:linktype="known" wx:pagename="Coppia_motrice" wx:page_id="735066" id="wx25">coppia</a> massima di 152 <a href="/wit/Newton_per_metro" title="Newton per metro" wx:linktype="known" wx:pagename="Newton_per_metro" wx:page_id="154163" id="wx26">Nm</a> a 2500 giri/min. Fu montato sulla <a href="/wit/BMW_Serie_3#La_Serie_3_E30" title="BMW Serie 3" wx:linktype="known" wx:pagename="BMW_Serie_3" wx:page_id="622244" wx:fragment="La_Serie_3_E30" id="wx27">BMW 324d E30</a> e sulla <a href="/wit/BMW_Serie_5#La_Serie_5_E28" title="BMW Serie 5" wx:linktype="known" wx:pagename="BMW_Serie_5" wx:page_id="1072105" wx:fragment="La_Serie_5_E28" id="wx28">BMW 525d E28</a> e fu prodotto dal <a href="/wit/1985" title="1985" wx:linktype="known" wx:pagename="1985" wx:page_id="4678" id="wx29">1985</a> al <a href="/wit/1988" title="1988" wx:linktype="known" wx:pagename="1988" wx:page_id="4675" id="wx30">1988</a>.</p>

<a id="M21TD25" name="M21TD25"/>
</wx:section><wx:section level="3" title="M21TD25" id="wxsec5"><h3 id="wx31">M21TD25</h3>

<p id="wx32">E' la versione sovralimentata del 2.4 litri BMW: fu prodotto dal <a href="/wit/1984" title="1984" wx:linktype="known" wx:pagename="1984" wx:page_id="4679" id="wx33">1984</a> al <a href="/wit/1991" title="1991" wx:linktype="known" wx:pagename="1991" wx:page_id="4672" id="wx34">1991</a> ed utilizzava un <a href="/wit/Turbocompressore" title="Turbocompressore" wx:linktype="known" wx:pagename="Turbocompressore" wx:page_id="482364" id="wx35">turbocompressore</a> <i id="wx36">Garrett T3</i> senza <a href="/wit/Intercooler" title="Intercooler" wx:linktype="known" wx:pagename="Intercooler" wx:page_id="744231" id="wx37">intercooler</a>, grazie al quale erogava una potenza massima di 115 CV a 4800 giri/min, con un picco di coppia massima pari a 211 Nm a 2400 giri/min. Questo motore fu montato su:</p>

<ul id="wx38">
<li id="wx39"><i id="wx40">BMW 324td E30</i>
<p id="wx41">(<a href="/wit/1986" title="1986" wx:linktype="known" wx:pagename="1986" wx:page_id="4677" id="wx42">1986</a>-94);</p>
</li>

<li id="wx43"><i id="wx44">BMW 524td E28</i>
<p id="wx45">(1984-88);</p>
</li>

<li id="wx46"><i id="wx47">BMW 524td E34</i>
<p id="wx48">(1988-<a href="/wit/1992" title="1992" wx:linktype="known" wx:pagename="1992" wx:page_id="4671" id="wx49">92</a>);</p>
</li>

<li id="wx50"><a href="/wit/Lincoln_Continental" class="new" title="Lincoln Continental" wx:linktype="unknown" wx:pagename="Lincoln_Continental" id="wx51">Lincoln Continental</a>
<p id="wx52">(1984-<a href="/wit/1985" title="1985" wx:linktype="known" wx:pagename="1985" wx:page_id="4678" id="wx53">85</a>);</p>
</li>

<li id="wx54">
<p id="wx55">Vixen 21TD (1984-85)</p>
</li>
</ul>

<a id="Voci_correlate" name="Voci_correlate"/>
</wx:section></wx:section><wx:section level="2" title="Voci correlate" id="wxsec3"><h2 id="wx56">Voci correlate</h2>

<ul id="wx57">
<li id="wx58"><a href="/wit/BMW" title="BMW" wx:linktype="known" wx:pagename="BMW" wx:page_id="58316" id="wx59">BMW</a></li>

<li id="wx60"><a href="/wit/BMW_Serie_3" title="BMW Serie 3" wx:linktype="known" wx:pagename="BMW_Serie_3" wx:page_id="622244" id="wx61">BMW Serie 3</a></li>

<li id="wx62"><a href="/wit/BMW_Serie_5" title="BMW Serie 5" wx:linktype="known" wx:pagename="BMW_Serie_5" wx:page_id="1072105" id="wx63">BMW Serie 5</a></li>

<li id="wx64"><a href="/wit/BMW_M20" title="BMW M20" wx:linktype="known" wx:pagename="BMW_M20" wx:page_id="1620513" id="wx65">BMW M20</a></li>

<li id="wx66"><a href="/wit/Motori_BMW" title="Motori BMW" wx:linktype="known" wx:pagename="Motori_BMW" wx:page_id="1701993" id="wx67">Motori BMW</a></li>
</ul>

<p id="wx68"><wx:template id="wx_t1" pagename="Template:Motori_automobilistici_BMW" page_id="1702242"/>
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<table style="margin:0 auto;" align="center" width="90%" id="toc">
<tr id="wx70">
<td align="center" colspan="3" id="wx71">
<div class="wx_image" wx:align="right" id="wx72"><a href="/wit/Immagine:Flag_of_Germany.svg" title="" wx:linktype="image" wx:pagename="Immagine:Flag_of_Germany.svg" id="wx73"><img src="/wit/Immagine:Flag_of_Germany.svg" alt="" width="30" id="wx74"/></a></div>

<big id="wx75"><b id="wx76">Motori automobilistici <a href="/wit/BMW" title="BMW" wx:linktype="known" wx:pagename="BMW" wx:page_id="58316" id="wx77">BMW</a></b></big> </td>
</tr>

<tr id="wx78">
<td colspan="1" id="wx79">
<div class="NavFrame" style="width:100%; background:#f7f8ff" id="wx80">
<div class="NavHead" style="background:#d4ebf9; text-align:center" id="wx81"><a href="/wit/Immagine:MoteurBMWV10Motorsport.JPG" title="" wx:linktype="image" wx:pagename="Immagine:MoteurBMWV10Motorsport.JPG" id="wx82"><img src="/wit/Immagine:MoteurBMWV10Motorsport.JPG" alt="" width="30" id="wx83"/></a></div>

<div class="NavContent" style="background-color:#f7f8ff; text-align:center" id="wx84">
<p id="wx85"><small id="wx86"><b id="wx87">Periodo pre-bellico</b>(<a href="/wit/1928" title="1928" wx:linktype="known" wx:pagename="1928" wx:page_id="4758" id="wx88">1928</a>-<a href="/wit/1941" title="1941" wx:linktype="known" wx:pagename="1941" wx:page_id="4748" id="wx89">41</a>):</small> <a href="/wit/BMW_M78" title="BMW M78" wx:linktype="known" wx:pagename="BMW_M78" wx:page_id="1693314" id="wx90">M78</a> | <a href="/wit/BMW_M328" title="BMW M328" wx:linktype="known" wx:pagename="BMW_M328" wx:page_id="1694400" id="wx91">M328</a> | <a href="/wit/BMW_M335" title="BMW M335" wx:linktype="known" wx:pagename="BMW_M335" wx:page_id="1697102" id="wx92">M335</a><br id="wx93"/>
<small id="wx94"><b id="wx95">Periodo post-bellico</b> (<a href="/wit/1945" title="1945" wx:linktype="known" wx:pagename="1945" wx:page_id="4752" id="wx96">1945</a>-<a href="/wit/1960" title="1960" wx:linktype="known" wx:pagename="1960" wx:page_id="4723" id="wx97">60</a>):</small> <a href="/wit/BMW_M337" title="BMW M337" wx:linktype="known" wx:pagename="BMW_M337" wx:page_id="1697189" id="wx98">M337</a> | <a href="/wit/BMW_OHV_V8" title="BMW OHV V8" wx:linktype="known" wx:pagename="BMW_OHV_V8" wx:page_id="1697577" id="wx99">OHV V8</a><br id="wx100"/>
<small id="wx101"><b id="wx102">Rilancio della BMW</b> (<a href="/wit/1961" title="1961" wx:linktype="known" wx:pagename="1961" wx:page_id="4722" id="wx103">1961</a>-<a href="/wit/1970" title="1970" wx:linktype="known" wx:pagename="1970" wx:page_id="4713" id="wx104">70</a>):</small> <a href="/wit/BMW_M10" title="BMW M10" wx:linktype="known" wx:pagename="BMW_M10" wx:page_id="1602572" id="wx105">M10</a> | <a href="/wit/BMW_M30" title="BMW M30" wx:linktype="known" wx:pagename="BMW_M30" wx:page_id="1608467" id="wx106">M30</a><br id="wx107"/>
 <small id="wx108"><b id="wx109">Dal <a href="/wit/1971" title="1971" wx:linktype="known" wx:pagename="1971" wx:page_id="4712" id="wx110">1971</a> al <a href="/wit/1990" title="1990" wx:linktype="known" wx:pagename="1990" wx:page_id="4673" id="wx111">1990</a></b> --&gt; Motori a benzina:</small> <a href="/wit/BMW_M20" title="BMW M20" wx:linktype="known" wx:pagename="BMW_M20" wx:page_id="1620513" id="wx112">M20</a> | <a href="/wit/BMW_M40" title="BMW M40" wx:linktype="known" wx:pagename="BMW_M40" wx:page_id="1621358" id="wx113">M40</a> | <a href="/wit/BMW_M42" title="BMW M42" wx:linktype="known" wx:pagename="BMW_M42" wx:page_id="1622819" id="wx114">M42</a> | <a href="/wit/BMW_M50" title="BMW M50" wx:linktype="known" wx:pagename="BMW_M50" wx:page_id="1635211" id="wx115">M50</a> | <a href="/wit/BMW_M70" title="BMW M70" wx:linktype="known" wx:pagename="BMW_M70" wx:page_id="1666709" id="wx116">M70</a><br id="wx117"/>
 <small id="wx118">Motori a gasolio:</small> <a href="/wit/BMW_M21" title="BMW M21" wx:linktype="self" wx:pagename="BMW_M21" wx:page_id="1620577" id="wx119">BMW M21</a><br id="wx120"/>
 <small id="wx121"><b id="wx122">Dal <a href="/wit/1991" title="1991" wx:linktype="known" wx:pagename="1991" wx:page_id="4672" id="wx123">1991</a> ad oggi</b> --&gt; Motori a benzina</small> : <a href="/wit/BMW_M43" title="BMW M43" wx:linktype="known" wx:pagename="BMW_M43" wx:page_id="1623253" id="wx124">M43</a> | <a href="/wit/BMW_M44" title="BMW M44" wx:linktype="known" wx:pagename="BMW_M44" wx:page_id="1623544" id="wx125">M44</a> | <a href="/wit/BMW_N42" title="BMW N42" wx:linktype="known" wx:pagename="BMW_N42" wx:page_id="1630537" id="wx126">N42</a> | <a href="/wit/BMW_N45" title="BMW N45" wx:linktype="known" wx:pagename="BMW_N45" wx:page_id="1660258" id="wx127">N45</a> | <a href="/wit/BMW_N46" title="BMW N46" wx:linktype="known" wx:pagename="BMW_N46" wx:page_id="1660405" id="wx128">N46</a> | <a href="/wit/BMW_M52" title="BMW M52" wx:linktype="known" wx:pagename="BMW_M52" wx:page_id="1645541" id="wx129">M52</a><br id="wx130"/>
 <a href="/wit/BMW_M54" title="BMW M54" wx:linktype="known" wx:pagename="BMW_M54" wx:page_id="1646244" id="wx131">M54</a> | <a href="/wit/BMW_N52" title="BMW N52" wx:linktype="known" wx:pagename="BMW_N52" wx:page_id="1654245" id="wx132">N52</a> | <a href="/wit/BMW_N53" title="BMW N53" wx:linktype="known" wx:pagename="BMW_N53" wx:page_id="1654327" id="wx133">N53</a> | <a href="/wit/BMW_N54" title="BMW N54" wx:linktype="known" wx:pagename="BMW_N54" wx:page_id="1656066" id="wx134">N54</a> | <a href="/wit/BMW_M60" title="BMW M60" wx:linktype="known" wx:pagename="BMW_M60" wx:page_id="1661954" id="wx135">M60</a> | <a href="/wit/BMW_M62" title="BMW M62" wx:linktype="known" wx:pagename="BMW_M62" wx:page_id="1662980" id="wx136">M62</a> | <a href="/wit/BMW_N62" title="BMW N62" wx:linktype="known" wx:pagename="BMW_N62" wx:page_id="1668691" id="wx137">N62</a> | <a href="/wit/BMW_N63" title="BMW N63" wx:linktype="known" wx:pagename="BMW_N63" wx:page_id="1689943" id="wx138">N63</a> | <a href="/wit/BMW_M73" title="BMW M73" wx:linktype="known" wx:pagename="BMW_M73" wx:page_id="1667025" id="wx139">M73</a> | <a href="/wit/BMW_N73" title="BMW N73" wx:linktype="known" wx:pagename="BMW_N73" wx:page_id="1673038" id="wx140">N73</a><br id="wx141"/>
<small id="wx142">Motori a gasolio</small>: <a href="/wit/BMW_M41" title="BMW M41" wx:linktype="known" wx:pagename="BMW_M41" wx:page_id="1621407" id="wx143">M41</a> | <a href="/wit/BMW_M47" title="BMW M47" wx:linktype="known" wx:pagename="BMW_M47" wx:page_id="1632767" id="wx144">M47</a> | <a href="/wit/BMW_N47" title="BMW N47" wx:linktype="known" wx:pagename="BMW_N47" wx:page_id="1784815" id="wx145">N47</a> | <a href="/wit/BMW_M51" title="BMW M51" wx:linktype="known" wx:pagename="BMW_M51" wx:page_id="1635444" id="wx146">M51</a> | <a href="/wit/BMW_M57" title="BMW M57" wx:linktype="known" wx:pagename="BMW_M57" wx:page_id="1661528" id="wx147">M57</a> | <a href="/wit/BMW_M67" title="BMW M67" wx:linktype="known" wx:pagename="BMW_M67" wx:page_id="1664725" id="wx148">M67</a><br id="wx149"/>
<small id="wx150"><b id="wx151">Motori prodotti in collaborazione con <a href="/wit/BMW_M" title="BMW M" wx:linktype="known" wx:pagename="BMW_M" wx:page_id="1436896" id="wx152">BMW M GmbH</a></b></small>: <a href="/wit/BMW_M88" title="BMW M88" wx:linktype="known" wx:pagename="BMW_M88" wx:page_id="1610578" id="wx153">M88 ed S38</a> | <a href="/wit/BMW_S14" title="BMW S14" wx:linktype="known" wx:pagename="BMW_S14" wx:page_id="1649473" id="wx154">S14</a> | <a href="/wit/BMW_S70" title="BMW S70" wx:linktype="known" wx:pagename="BMW_S70" wx:page_id="1680969" id="wx155">S70</a> | <a href="/wit/BMW_S50" title="BMW S50" wx:linktype="known" wx:pagename="BMW_S50" wx:page_id="1647220" id="wx156">S50</a> | <a href="/wit/BMW_S54" title="BMW S54" wx:linktype="known" wx:pagename="BMW_S54" wx:page_id="1648958" id="wx157">S54</a><br id="wx158"/>
 <a href="/wit/BMW_S62" title="BMW S62" wx:linktype="known" wx:pagename="BMW_S62" wx:page_id="1664001" id="wx159">S62</a> | <a href="/wit/BMW_S85" title="BMW S85" wx:linktype="known" wx:pagename="BMW_S85" wx:page_id="1685531" id="wx160">S85</a> | <a href="/wit/BMW_S65" title="BMW S65" wx:linktype="known" wx:pagename="BMW_S65" wx:page_id="1689881" id="wx161">S65</a><br id="wx162"/>
<small id="wx163"><b id="wx164">Motori prodotti in collaborazione con altre Case</b></small>: <a href="/wit/Motore_Tritec" title="Motore Tritec" wx:linktype="known" wx:pagename="Motore_Tritec" wx:page_id="1690272" id="wx165">Tritec</a> | <a href="/wit/Motore_Prince" title="Motore Prince" wx:linktype="known" wx:pagename="Motore_Prince" wx:page_id="1691089" id="wx166">Prince</a><br id="wx167"/>
</p>
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</div>
</td>
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</table>

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<div id="wx_categorylinks">
<a href="/wit/index.php?title=Speciale:Categories&amp;article=BMW_M21" title="Speciale:Categories" wx:linktype="known" wx:pagename="Speciale:Categories" id="wx168">Categoria</a>: <span dir="ltr" id="wx169"><a href="/wit/Categoria:Motori_BMW" title="Categoria:Motori BMW" wx:linktype="known" wx:pagename="Categoria:Motori_BMW" wx:page_id="1602580" id="wx170">Motori BMW</a></span></div>
<div id="wx_languagelinks">
Altre lingue: <a href="http://en.wikipedia.org/wiki/BMW_M21" class="external" wx:linktype="interwiki" wx:pagename="en:BMW_M21" id="wx171">English</a> | <a href="http://no.wikipedia.org/wiki/BMW_M21" class="external" wx:linktype="interwiki" wx:pagename="no:BMW_M21" id="wx172">Norsk (bokmål)</a> | <a href="http://pl.wikipedia.org/wiki/BMW_M21" class="external" wx:linktype="interwiki" wx:pagename="pl:BMW_M21" id="wx173">Polski</a></div>
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