But now VW is adding a nice, socially conscious version to the Touareg lineup. The 3.0-liter V-6 clean diesel launched at the L.A. auto show gets 25 mpg on the highway and 18 mpg in the city, and VW claims that it is one of the cleanest engines available on the market. It is 50-state-legal, partially through the use of a costly catalytic converter that nearly eliminates NOx emissions.
Despite the Touareg’s considerable heft, it moves quickly and effortlessly. Driven by 225 hp and 406 lb-ft. of torque, the V-6 TDI reaches 60 mph from a standstill in 8.5 seconds. Top speed is governed at 130 mph.
The Touareg V-6 TDI is a remarkably smooth SUV. There is almost none of the characteristic growl that distinguishes the Touareg V-10 TDI from its gasoline-powered competition. The main reason for this is the injection system: while the V-10 TDI uses unit injectors, a technology on which Volkswagen has suspended further development, the V-6 TDI gets its fuel served up by a common-rail system operating with piezo injectors. This allows VW to optimize the combustion for smoothness.
Source: Car and Driver