July 28, 2006 Caterham is famed for producing some of the fastest cars in the world, and we tend to give the cars regular coverage because they offer a bang-per-buck factor that’s right up there with their power to weight ratio. So what happens when you take a Caterham and refocus its 550 kg weight towards achieving efficient fuel consumption rather than in getting there quickly? A modified Caterham Seven Roadsport 1.6-litre 16-valve K Series sports car was entered in the recent Shell Eco-Marathon. A bit of aerodynamic modification and a set of narrow low rolling resistance tyres were the main changes alongside some economic driving techniques to ensure it maximised every drop of fuel. The sportscar was the only road registered car in the event and the team was hoping for 100mpg. On the day, it recorded 131 miles per gallon.