Which used Audi A6 estate should I buy?
Most engines are strong, although the base 2.0 petrol and 2.0 turbodiesel feel slightly short of puff and struggle to pull the Avant when fully loaded. The 2.4 V6 is stronger, but the 3.2 V6 petrol is a better bet. It's smooth and provides strong pulling power over a wide rev range, as do the 2.7 and 3.0 V6 turbodiesels.
The 4.2 V8 petrol is hugely powerful and sounds great, while the direct-injection 4.2 V8 is punchier still, yet is more fuel-efficient.