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

Caterham Sevens reimagined as classic F1 cars

You could never really call the Caterham Seven modern – its look has remained fundamentally unchanged since the original Lotus Seven (the car Caterham would eventually buy the rights to build) launched back in 1957. Today, the engine is still in the front, those delightfully exposed front wheels still float over bumps and the frog-eyed headlights serve as a reminder of years gone by. And now the modern Seven has been taken right back to the period where it was first conceived, with these Grand Prix-style racers from Zolland Design.

U.S. seeks 5 percent annual fuel-economy gains through 2016

The Obama administration today proposed gasoline mileage and greenhouse-gas pollution standards for new vehicles for model years 2012 to 2015, filling in the blanks for manufacturers en route to a 35.5 mpg national target in 2016. The Transportation Department and EPA proposal calls for fuel economy to increase by about 5 percent each year, starting from an average of 27.3 mpg for the 2011 model year, the agencies said in a statement. The average car buyer would save more than $3,000 in fuel costs over the life of a vehicle, the statement said.

Concept Car of the Week: Citroën Karin (1980)

With the 1980 Paris Motor show approaching and no new model to unveil, Citroën needed something to wow the crowds on its home turf. Trevor Fiore – who followed Robert Opron as the head of Citroën Design for a short time – gave the go-ahead for an innovative concept starting from a blank sheet of paper. The final concept was named Karin, and it was nothing short of breathtaking.