If you’re looking for a road car in which you can occasionally pop along to a race track, shop elsewhere. Radical has modified the SR3's chassis to make the SL friendlier for the road – it runs less negative camber than regular SR3s, for example – but there’s only so much you can do to a pseudo-racing car.
The SL remains a tiring roadgoing companion, chasing after cambers and tramlining like a cat pawing at a ball of wool. It doesn’t glide across surfaces impervious to imperfections in the way a Lotus 2-Eleven does; nor is it as composed as an Ariel Atom or Caterham Seven.
There’s still amusement to be had, however. Overtakes are easy thanks to the deep swell of torque and fine visibility, while the sheer view out, across those front wings, is far too reminiscent of a prototype sports car to be anything other than a hilarious and fascinating blast.
But those sports prototype looks tell you where the SL really belongs, which is in the same place as all other Radicals: on smooth, one-way roads with no speed limits and a marshal at each corner. On a circuit, the SL is superb.
Its bigger-capacity turbocharged engine makes it a less frenzied experience than most other Radicals or, say, Ariel’s Atom V8. But unless you’ve slapped numbers on the side and are running against pure racing variants of the SR3, there’s all the pace and focus you could hope for.
Any grip deficiencies offered by the road-friendly Kumho tyres is more than offset by the aerodyanmic grip, while the overall balance of the SL’s chassis is sound, with a forgiving limit that it urges you to find.