What separates a road car from a race car? You're looking at it. It's the Lotus Exige V6 Cup, a model based on what is already one of the most hardcore performance machines on the road, albeit upgraded to an even harder-core spec. It's a good 130 pounds lighter than the Exige S (a vehicle which didn't have much flab to trim in the first place) and can hit 60 in under four seconds. With the notably exception of certain versions of the Porsche 911, there aren't a lot of six-cylinder cars that can claim that kind of performance.
In fact, the Exige V6 Cup is so close to race spec that it's already eligible for a number of racing series. Just bolt in the removable FIA-certified roll cage, maybe swap on some slick tires and you're good to go. Then you can drive it home again when you're done, just like in sports car racing's heyday. But don't take our word for it: the team over at XCar took the V6 Cup to the UK's Goodwood circuit to see how it compared to the Exige S it recently drove, and you can view the stirring results in the video below.