Convertible supercars of the calibre of the 600LT Spider, so little afflicted by dynamic compromise compared with their fixed-roof relatives and so compelling to drive at their best, are truly rare.

The performance and handling tests whose findings are discussed on these pages are rigorous enough still to expose a measurable dynamic flaw or two with most open-top conversions, but so convincing was this car’s response to them that you could simply transpose them onto the test sheet of the 600LT coupé and still be seriously impressed.

Great, at times, on track, but nothing short of sublime on the road

In that respect, this car makes a strong case for a glowing five-star score. But judged instead simply as one of a pair of near-enough indecipherable 600LT siblings, our road test jury had just enough reservation to hold back a little bit of that maximum credit.

The 675LT left you in absolutely no doubt about the extra level of oft-imposing, always rewarding driver appeal that the Longtail brand stands for. While the 600LT offers a similar upgrade on track purpose, its overall driver appeal, as unearthed by this test, is considerable – but isn’t quite so transformed.

What Car? New car buyer marketplace - Mclaren

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