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

New Audi S1: 231hp, sub-£25k price

Pictures and full details of the Audi S1 have been released ahead of the car’s public debut at the Geneva Motor Show next month. If the bright yellow colour of the car pictured doesn’t grab you, the stats probably will – this pocket rocket has four-wheel drive, a 0-62mph time of just 5.8 seconds and prices starting from less than £25,000 (just). Audi Audi S1: what's new?

MP slams ministerial cars 'waste'

MINISTERS have been accused of wastefulness by having their official cars sitting outside Parliament with the engines running. Labour MP Thomas Docherty said he had seen Government cars sitting in New Palace Yard - one of the main thoroughfares in and out of the Palace of Westminster - for more than an hour with their engines turned on. Commons Leader Andrew Lansley said he had not noticed the problem on his frequent visits in and out of the palace.

Concept Car of the Week: BMW Turbo (1972)

Built by Michelotti in Turin and unveiled at the 1972 Paris motor show, the BMW Turbo was built both as a symbol of the carmaker's strength after its troubles in the ‘60s and as a celebration of that summer's Olympic Games in Munich. This two-door coupe, based on a modified 2002 chassis with a mid-mounted engine, was born when BMW's design director Paul Bracq convinced the board to let him design a concept that would be part design exercise, part technology testbed. Safety had become an increasingly important consideration following a number of design summits in the early ‘70s, and Bracq used the Turbo to test out a number of safety solutions.