The 35 TDI diesel that we also recommend in the A4 is quick, smooth and economical. S line has lowered suspension and 19in wheels, so it's firmer-riding than some might like. It also adds leather ...

This 148bhp 2.0-litre diesel engine offers similar outright performance to the cheaper 35 TFSI petrol but with more low-rev oomph. If you do lots of miles of plan to tow, it's worth a look.