The 500-hp club: The room is getting crowded

At a time when fuel economy counts for just about everything, there's still a horsepower war raging in the United States. The number of fire-breathing wedge-shaped supercars and hot sedans and coupes that can pump out 500 hp or better has nearly doubled in the past five years to more than 70. A decade ago there were just two members of the 500 hp club in the United States: the Ferrari 575M and Lamborghini Murcielago.

Nissan backs radical DeltaWing racecar program

Nissan has announced its involvement in a radical new motorsport project, dubbed the DeltaWing, which will race at the Le Mans 24 Hours this summer using Nissan power. The car is the work of Ben Bowlby who originally designed the car as a proposal for the 2012 IndyCar racer, which has since found the attention of Nissan after its rejection by the American race championship. The headlines of the design are that it's half the weight and has half the aerodynamic drag of a conventional racer and is therefore far more efficient.

Mercedes G63 AMG 6×6 vs G63 AMG (video)

Mercedes G63 AMG 6×6 vs G63 AMG The Mercedes G 63 AMG is a mad car in its own right (although not as mad as the G 65) and costs almost £125k before you start ticking any option boxes. But the G 63 AMG is bullet proof, will go anywhere and does come with many of the luxuries you’d rightfully expect in a £125k car, even if its on-road handling – particularly if you decide to make the most of the 5.5 litre V8 turbo’s  performance – is pretty woeful round the bends. Mad and irrational though the G 63 may be, it now has an even madder sibling – the Mercedes G 63 AMG 6×6 – which not only adds an extra axle for 6WD but comes at a price – almost £400k – that makes the G 63 seem a bargain.