What is it?
BMW has given its 6 Series a mild makeover for 2015. As most of the changes cover styling tweaks and equipment upgrades to the standard versions, spotting a new M6 Convertible requires a ‘Where’s Wally?'-type forensic eye.
There are small differences, though. Now you get LED headlights as standard, plus a gloss black finish around the climate control buttons to enhance what was already a beautifully crafted interior.
Power from the 4.4-litre twin-turbocharged V8 remains the same at 552bhp, as does the option to upgrade it to 567bhp if you go for the Performance Package.
However, someone must have written to BMW complaining that wasn’t good enough because M Division has also introduced a 592bhp Competition Package as well.
What's it like?
Although that Competition Package is available to order now, there aren’t any cars thus equipped in the UK yet, so we made do with the standard car. ‘Made do’ perhaps isn’t the correct turn of phrase; even in this state of tune the M6 Convertible is still ridiculously quick and blessed with a great engine.
Step hard on the accelerator and there is a momentary pause while you wait for the two turbos to limber up. But when they do, cramming as much oxygen into those eight combustion chambers as each will reasonably endure, the M6 presses you firmly back in your seat and just goes.
So much so, in fact, that you'll do the occasional double take after contemplating the incongruous speed reading being beamed back at you from the head-up display. At this stage, you might utter something impolite, too.
It also sounds great, and all the better with the roof down. It’s not a lazy V8 burble, but a hard-edged, clearly defined howl, punctuated by loud woofs during each gear change. Those changes are finger-click fast, too if you set the seven-speed dual-clutch gearbox to maximum attack.
So there’s no questioning the M6 Convertible’s straight-line credentials, but eventually, inevitably, you will reach a corner. In this instance, your first task will be to shed speed, and suddenly you become aware of the car's two-tonne mass and the resulting inertia.