Audi has increased the all-weather performance of its diesel TT 2.0 TDI coupe and roadster models, by adding a Quattro all-wheel drive system.

The new models will also exclusively feature a six-speed S tronic twin-clutch automatic gearbox, unlike the existing front-wheel drive models which only come with a manual.

In most everyday driving situations the Quattro system will direct the engine’s power to the front wheels. Should traction decrease there, torque is sent to the rear within a few milliseconds.

This means efficiency is still optimised with CO2 emissions of 137g/km (142 roadster) and average mpg of 54.3.

The 2.0-litre TDI engine develops 184ps and 380nm of torque, allowing the car to accelerate from 0-60mph in 6.7 seconds and achieve a top speed of 145mph.

Prices are yet to be announced but the order books open in January with deliveries expecting in the spring.