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201616 Mar



After withstanding the challenges faced by the Volkswagen Group over its diesel emissions scandal, the automaker has just revealed its foray in the high-performance diesel SUV, the SQ7 TDI, which blends proven, decades-old technology with a complex, state-of-the-art forced-induction system. 


the engine is equipped with an electric compressor, essentially a small electric motor that spins a compressor up to 70,000 rpm and provides boost pressure to the engine instantaneously. Audi previewed an early version of the technology in an RS 5 TDI concept. The latest version is slightly different as it consists of a standalone electric compressor which generates boost pressure on its own (the previous version spooled a turbocharger’s compressor at low revs).


The engine in the SQ7 TDI is a twin-turbocharged 4.0-liter V-8 diesel, which is mated to an 8-speed automatic and all-wheel-drive system. Two turbochargers are arranged in a sequential setup and add boost pressure in a conventional way, i.e. by relying on exhaust gasses to spool up their compressor wheels. This, of course, suffers from turbo lag at low engine speeds.


The SQ7 TDI will go on sale in Europe this spring. Audi is yet to mention whether we'll see the SQ7 TDI in the United States, though the automaker states that its engine is legal in the United States.

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