MINI EfficientDynamics

At launch in 1959, the original Mini was designed for family buyers on a budget.

While you’d struggle to call the current MINI a bargain to buy, it does share its predecessor’s reputation for low running costs.

The British maker has access to parent company BMW’s clever EfficientDynamics technology. As a result, most MINI hatch and Clubman estate models get low-rolling-resistance tyres, lightweight engines, aerodynamic underbody panelling, brake regeneration and gearshift indicators.

Look under the bonnet and you’ll find a water pump that activates only when the engine is up to temperature, a flow-regulated oil pump and electric power-steering that uses less energy than a conventional hydraulic system.

Finally, all six-speed manual models – apart from the hot JCW – are equipped with Auto Start/Stop, which shuts off the engine when the car is at a standstill.

All this adds up to some impressive eco credentials. For instance, the 1.6-litre diesel-engined Cooper claims CO2 emissions of 104g/km and a combined economy figure of 72.4mpg.

Buyers looking for even greener transport will be pleased to see that the electric MINI E has hit UK roads. A select band of 40 volunteers is being given access to the car as part of a six-month trial of the model, which promises zero emissions running and a range of 120 miles from a single charge.

However, this technology won’t be transferred to a production car until 2015.

BEST ECO BUY: Clubman Cooper D