Autocar Magazine Test Drive the All-New SR4

This is what they had to say...

GO-KART WITH ROAD CRED

Two things you pray for when testing a Radical: a dry track and a circuit full of fast curves where its downforce can really be exploited. Spirits were high as I rolled into the Bedford Autodrome under blue skies, then promptly sank when I saw that we could only use a small ribbon of track.

You see the new SR4, which replaces the original Clubsport, is just like every other Radical. Here, it wouldn't get out of third gear and the 1200cc Kawasaki engine - as used in the ZZR 1200 bike, but tweaked to 190bhp at 11,000rpm - wouldn't have sufficient torque to lunge even the 450kg SR4 out of the tight stuff.

Wrong. Anyone serious about track days - serious as in I've mastered the GT3 and want to move up a level - needs to sample one of these. Based on an entirely new tubular chassis, with a totally revised areo kit incorporating front-mounted air intakes for the first time on Radical, it is superb.

Remember that ecstatic feeling when you drove a go-kart for the first-time? That's what the SR4 offers. Something so far removed from anyother road car (Caterham included) that it responds just like a race car. Accuracy takes on new levels of calibration: missing an apex by 5cm in the SR4 feels clumsier than not getting round a corner at all in a Porsche Cayenne. In fact this was a race car, but the difference between it and a car you can drive to the circuit is about £2500 in legal bits.

What a shame that you won't be able to get there on the Slovakian Matador slicks. Designed specially for the SR4, they provide an uncanny balance of superb grip and easily managed break-away characteristics. So where I'd expected the SR4 to bog down the whole time, it lugged really hard low down. And despite running slicks, it could be drifted about at will. Radical has commissioned the same company to create a road-legal track tyre and if this effort is anything to go by, it should be an absolute stunner.

Mechanically the SR4 is grass roots Radical: bike engine, chain drive, Quaife LSD and double wishbones all round. There's even a proper reverse gear. It's a car sorted on the track and then released onto the road. As a result I've almost given up being impressed by what these cars can do on a circuit. This SR4, like the SR3 is so much faster and better than any other conventional machine on sale that nothing can touch it. And having driven the SR3 on the road during that idiotic story recently (Wild Bunch, 10th February), I can honestly say that a road-spec SR4 would be no more inconvenient than any other stripped-out quasi-racer without a screen

It all contrives to concentrate the mind on just how sorted a company Radical has become. The finish of this very early car is superb. All the small engineering touches, from the mini-group-C engine bay, to the single fillet of carbonfibre that acts as a dashboard, smacks of deep care and attention. It feels like it will last. In fact, it feels so good that if you happen to have a spare £25k plus VAT lying around idle, you really should want to have a rip yourself.

So What Do We Think?

Track cars don't come any faster, better or more exciting than this.

Radical SR4 Clubsport, Price £29,500, On Sale Now