Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Future Audis may time traffic lights for you

Here's a trick efficiency-chasing hypermilers have been using for years: spotting the cycles of stoplights from 100 to 200 yards out and letting the car coast up to the light just before it turns green, then carrying on without ever letting the car come to a complete stop. These hypermilers, along with professional truck drivers, do this because they know that accelerating from a standstill burns the greatest amount of fuel, and because letting a car coast up to the light with the automatic transmission downshifting by itself is easier on the transmission than stomping on the brakes right beneath the stoplight. Oh, and it's easier on the brake pads as well.

New MINI price from £13,750 – on sale this weekend

The new 2014 MINI Hatch (pictured) goes on sale this weekend We had the reveal of the all new MINI at the end of last year at the Los Angeles and Tokyo Motor Shows, and the new MINI One turned up on MINI’s stand at the Geneva Motor Show this week. And now it’s going on sale in the UK. Sitting on BMW’s new UKL1 platform, the new MINI may be more BMW under the skin than before but, despite growing in size, it’s still very much a MINI.

Porsche Panamera Turbo Powerkit adds 40hp

Porsche Panamera with the new Sport Design Pack The Porsche Panamera has the same problem all Porsches have – it’s easy to admire but quite hard to love. And it goes further for the Panamera because it has to suffer the same sniping about its looks as its SUV sibling, the Porsche Cayenne. But Porsche aren’t losing sleep over the constant jibes about the ugly ducklings in their range.