[gwyllion]

De Race Touareg 2 zal in 2007 uitgerust zijn met een geevolueerde motor.

Volkswagen with new four-valve TDI-engine in 2007 Dakar Rally

The 2.5 litre five-cylinder in-line diesel engine in the Race Touareg 2 is equipped with a completely newly developed cylinder head, which helps to increase the power output to 285 hp and push the maximum torque over 600 Nm. The response characteristics of the two-stage forced induction Turbo-Diesel were also noticeably improved for the demanding desert event.

During a series of dynamometer runs, intensive tests and its first competitive outing the newest version of the engine has already proven its performance and reliability. Because of the 39 millimetre diameter intake-air restrictor, stipulated by the regulations, the absolute power only climbs by approximately 10 hp. However, the new and improved cylinder-head architecture allows a superior gas flow rate, which improves the power and initial response throughout the rev range. The torque delivered by the engine climbs correspondingly to over 600 Nm.

The induction and exhaust tracts on the four-valve engine differ from its predecessor in that they are no longer mounted on one side of the engine, but opposite one another. "In spite of the greater power output the engine is actually more thermally efficient than before”, emphasises Donatus Wichelhaus is responsible for the engine development.

bron: http://www.volkswagen-motorsport.com...e&st=73&id=978

Snel even de geschiedenis van de 5 cilinder TDI.

• 2004: 2.3 liter, 175 kW/238 pk, 450+ Nm
• 2005: 2.5 liter, 191 kW/260 pk, 500+ Nm (vergrootte cilinderinhoud)
• 2006: 2.5 liter, 202 kW/275 pk, 550+ Nm (twin-stage turbo)
• 2007: 2.5 liter, 209 kw/285 pk, 600+ Nm (gewijzigde cilinderkop)