The S4 is a exciting compact saloon car.
The 4.2-litre V8 has been replaced by a 3.0-litre suercharged V6 engine.
The interior switchgear has been lifited out of standard A4 and been tweaked with sporty trimming.
Despite a reduction in power, the new S4 has a more instant trottle reposne making it feel faster.
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