PSA ES/L engine

{{More citations needed|date=January 2019}}

{{Infobox automobile engine

|name=PSA ES/L engine

|image=Moteur V6 ES9 coupé 406.JPG

|aka=PSA ES, Renault L

|configuration=60° V6

|manufacturer=PSA Group (Peugeot, Citroën) & Renault

|production=1997–2010

|predecessor=V6 PRV engine

|valvetrain=DOHC 4 valves x cyl.

|block=Aluminum alloy

|head=Aluminum alloy

|displacement={{cvt|2946|cc|L|1|order=flip}}

|bore={{cvt|87|mm|2}}

|stroke={{cvt|82.6|mm|2}}

|fueltype=Petrol

|fuelsystem=Fuel injection

|coolingsystem=Water-cooled

|power={{cvt|140|-|228|kW|PS bhp|0}}

|turbocharger=In Venturi Atlantique 300 Bi-turbo

|caption=ES9 J4S engine in a Peugeot 406 coupé

|emissions control=Catalytic converter

}}

The PSA ES/L engine is a V6 petrol engine used in automotive applications. It was co-developed by the PSA Group (Peugeot and Citroën) and Renault to replace the outdated V6 PRV engine. It was introduced in 1997 with the Peugeot 406 Coupé. It is designed and manufactured by the company "Française de Mécanique" for PSA and Renault. In PSA, the engine is known as the ES engine, in Renaults, the engine is known as the L engine.

Unlike the PRV V6, which was a 90° engine because it was developed from a V8 project, the ES/L has a traditional 60° V-angle. It is constructed entirely in aluminum, and available only in DOHC 24-valve format. Its sole iteration, the ES9 (PSA) or L7X (Renault), has a displacement of {{cvt|2946|cc|L|1}}, slightly less than the 3.0 L variant of the PRV. Bore and stroke is {{cvt|87x82.6|mm}}. A 3.3 L version was initially planned as well, but did not see production due to decreasing demand in V6 petrol engines in Europe and Renault's switch to Nissan-sourced V6 after its alliance with the Japanese carmaker.

Initially, the ESL produced {{cvt|140|kW|PS bhp|0}} in accordance with German and French insurance category limits in force at the time for engines under 3 litres. (The BMW 2.8 and Audi 2.8 produced the same figure circa {{cvt|194|PS|kW bhp|0}}) In 2000, Porsche retuned the Peugeot/Citroën version of the engine introducing variable valve timing on the intake camshafts varying between 0 and 40 degrees, improving fuel consumption, low engine speed flexibility for the introduction of the Peugeot 607 and Citroën C5. This iteration, called ES9 J4S, can now achieve {{cvt|152|kW|PS bhp|0}}. In 2005, Peugeot/Citroën slightly upgraded the power to {{cvt|155|kW|PS bhp|0}}. This version was not used by Renault who was by then focusing on Nissan-developed V6.

In 2000, Tom Walkinshaw Racing created a competition version for use in the Renault Clio V6. It could achieve a maximum of {{cvt|206|kW|PS bhp|0}} in racing trim, with a version detuned to {{cvt|169|kW|PS bhp|0}} for the road car. The road version's power was improved to {{cvt|187|kW|PS bhp|0}} by Renault Sport in 2004.