a-7 meaning in Chinese

A slightly more practical [A6] from [Audi] to rival the [Mercedes-Benz] CLS. A 5-door hatchback ([liftback]), available with 2.8- (204PS) and 3.0-litre (300PS) six-cylinder petrol engines (the latter being [supercharged]) and a 3.0-litre six-cylinder [turbocharged] diesel engine in three states of tune (204PS, 245PS and 315PS), with the most powerful engine having two turbochargers for extra oomph.

A high-performance variant - the S7 - is equipped with a 4.0-litre twin-turbocharged eight-cylinder petrol engine; the same engine in fact, as the second generation [Bentley Continental GT].
> "Is that a CLS over there?"
> "Nope. It's an Audi A7."
> "Really? they look similar in profile."