See 1000q: tax credit and TDI for details. Power in the Touareg and Q7 are rated at 225 hp and 406 lb-ft of torque at only 1,750 rpm. EPA rating in the Touareg is 17 city/25 highway, significantly more than the V6 or V8 gas engine Touareg.ome of the technology on the CATA 3.0L TDI engine is common rail fuel injection which uses extremely rapid piezoelectric (like the vibrating sonicare toothbrush head) injections of fuel at about 29,000 psi! To compare, the average gasoline engine injects fuel at about 60 psi. The turbo is a VNT variable nozzle turbo.