Audi SQ7 TDI (2017) Test Drive. The all-new 4.0 TDI generates its power from a displacement of 3,956 cc, combining superior performance with low consumption. With 435 horsepower (320 kW) and 900 Nm (663.8 lb-ft) of torque between 1,000 and 3,250 rpm, the SUV sets new benchmarks in the segment.
The V8 diesel engine accelerates the Audi SQ7 TDI from 0 to 100 km/h (62.1 mph)in 4.8 seconds, and on up to an electronically governed top speed of 250 km/h (155.3 mph). In the NEDC, however, it consumes just 7.2 liters pro 100 Kilometer (32.7 US mpg), corresponding to 189 grams CO2 per kilometer (304.2 g/mi).
The new 4.0 TDI is a biturbo that is supported in the lower range by an electric powered compressor (EPC). Its two exhaust-gas turbochargers feature a variable turbine geometry and produce up to 2.4 bars of boost pressure (relative). The EPC supports the turbochargers whenever the exhaust gas provides too little energy for the rapid development of power.
The electric powered compressor is placed in a bypass downstream of the intercooler, i.e. close to the engine. Instead of a turbine wheel, it houses a compact electric motor. It accelerates the engine’s compressor wheel up to 70,000 rpm in less than 250 milliseconds. With the support of the electric powered compressor, the power of the 4.0 TDI is always available spontaneously and without delay when the accelerator is depressed, even at low engine speeds. When driving off, the SUV immediately jumps out to a lead of several meters over its competitors When driving with a focus on comfort, the electric powered compressor technology prevents an unnecessarily large number of downshifts, thus keeping the rev level low. Sporty drivers will appreciate the passing power and immediate delivery of power when exiting a curve.
In Europe, the Audi SQ7 TDI can be ordered beginning spring 2016. It will be offered in Germany for a base price of €89,900.
Audi SQ7 TDI interior: https://youtu.be/0M9_Jj6Gm94
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