Lamborghini V8

{{more citations needed|date=June 2008}}

{{Infobox automobile engine

| name = Lamborghini V8

| image = File:Musée Lamborghini 0008.JPG

| aka =

| manufacturer = {{flagicon|Italy}} Lamborghini

| production = 1971–1988

| predecessor =

| configuration = Naturally aspirated 90° V8

| displacement = {{ubl |{{cvt|1995|cc|L cuin|1|order=flip}}|{{cvt|2463|cc|L cuin|1|order=flip}}|{{cvt|2997|cc|L cuin|1|order=flip}}|{{cvt|3485|cc|L cuin|1|order=flip}}|{{cvt|3798|cc|L cuin|1|order=flip}}|{{cvt|3995|cc|L cuin|1|order=flip}}}}

| bore = 2.0: {{cvt|77.4|mm|2}}
2.5/3.0/3.5: {{cvt|86|mm|2}}
4.0/L411: {{cvt|90|mm|2}}
3.8/GTP: {{cvt|91|mm|2}}

| stroke = 2.0/2.5: {{cvt|53|mm|2}}
3.0: {{cvt|64.5|mm|2}}
3.5: {{cvt|75|mm|2}}
4.0/L411: {{cvt|78.5|mm|2}}
3.8/GTP: {{cvt|73|mm|2}}

| length =

| diameter =

| width =

| height =

| weight =

| block = Cast aluminium alloy

| head = Cast aluminium alloy

| valvetrain = 2 valves per cylinder,
2.0/2.5: SOHC,
3.0/3.5/3.8/4.0: DOHC

| fuelsystem = Solex or Weber carburetors

| fueltype = Petrol/Gasoline

| oilsystem = Wet sump

| coolingsystem = Water-cooled

| power = 2.0: {{cvt|136|kW|PS bhp|0}} at 7,800 rpm
2.5: {{cvt|164|kW|PS bhp|0}} at 7,500 rpm
3.0: {{cvt|186|kW|PS bhp|0}} at 7,500 rpm, or
{{cvt|194|kW|PS bhp|0}} at 7,500 rpm, or
{{cvt|198|kW|PS bhp|0}} at 7,800 rpm
3.5: {{cvt|190|kW|PS bhp|0}} at 7,000 rpm
4.0/L411: {{cvt|588|kW|PS bhp|0}} at 9.000 - 9,750 rpm
3.8/GTP: {{cvt|500|kW|PS bhp|0}} at 10,000 rpm

| specpower = 2.0: {{cvt|{{#expr:136/1.995 round 1}}|kW|PS bhp|1}} per litre
3.5: {{cvt|{{#expr:190/3.485 round 1}}|kW|PS bhp|1}} per litre
3.8/GTP: {{cvt|{{#expr:500/3.798 round 1}}|kW|PS bhp|1}} per litre

| torque = 3.0: {{cvt|273|Nm|lbft|0}} at 5,750 rpm
4.0/L411: {{cvt|730|Nm|lbft|0}} at 4.000 - 7,000 rpm

| compression =

| fuelcon =

| specfuelcon =

| oilcon =

| successor = Lamborghini V10 (indirect)

}}

The Lamborghini V8 is a ninety degree (90°) V8 petrol engine designed by Lamborghini in the 1970s for their less-expensive vehicles.Lamborghini Urraco & the V8s Urraco, Bravo, Silhouette, Athon, Jalpa. Jean-Francois Marchet, Osprey autohistory, 1983 It was only the second internal combustion engine ever developed by the company, and first saw production for the 1971 Lamborghini Urraco.{{cite web|title=Lamborghini Urraco, Silhouette & Jalpa|url=http://www.carsfromitaly.net/lambo/urraco.html|work=CarsFromItaly.net|accessdate=9 January 2010}} It was designed by Giampaolo Dallara. The all-aluminium alloy engine was introduced as a 2.5-litre variant, displacing {{cvt|2463|cc}}, but was expanded, by increasing the piston stroke to a 3.0-litre variant for 1975 - now displacing {{cvt|2997|cc}}.

A 2.0-litre reduced-stroke version was also introduced in 1975 for sale in Italy, displacing {{cvt|1994|cc}}, because of Italian legislation which imposed punitive taxes on cars whose engines displaced more than 2.0 litres.

This V8 engine was also used in two other models, the Lamborghini Silhouette in 1976–1977 in which it kept the 3.0-litre displacement, and the slightly updated replacement in 1982, the Lamborghini Jalpa, which saw the engine increased in size to 3.5 litres, displacing {{cvt|3485|cc}}, for ease in meeting ever-tighter emissions requirements.