As you read this, 11 white Audi A4s are being driven from Vienna in Austria to Basle in Switzerland on the first leg of a fuel-efficiency marathon in which they need to burn less than four litres/100km. Here’s what’s happening – and why…
Audi claims that an A4 fitted with its new 88kW, two-litre turbodiesel engine will use 4.1 litres/100km in freeway driving and 6.7 litres/100km in city traffic but, with German car magazine Auto Bild, has organised a fuel-efficiency trial to see just low an A4’s fuel consumption can go.
To qualify, entrants have to drive 1650km from Basle through Germany, to Vienna and then back, mostly on freeways but with some city driving thrown in – on one tank of diesel!
The A4’s tank holds 65 litres, so each team will have to average less than four litres/100km – 3.939, in fact – just to finish.