We’ve been here before, of course, with the old M3 GTS, a bright orange race track refugee with a searing 4.0-litre V8 engine. The recipe is much the same here, just with less orange.
The tweakery starts under the bonnet, where BMW has added a water injection system to the twin-turbo, 3.0-litre straight-six engine, which lowers the temperature in the combustion chamber, allowing higher boost pressure and earlier spark timing. The net result is an extra 68bhp and 37lb/ft of torque, taking the totals up to 493bhp and 443lb/ft.
As a result, the 0-62mph time drops to 3.8secs (down from 4.1secs) and top speed increases to 190mph (up from a limited 155mph). And yet it still does 34mpg. Witchcraft involved somewhere, I reckon. The water is stored in a five litre tank in the boot.
62kg of extraneous stuff has been stripped, bringing the weight down to 1,510kg out by junking the back seats, using thinner doors, even ditching the door pulls in favour of fabric straps, among other things. The front seats are racing-style carbonfibre buckets; a rollcage and six-point harnesses are optional if you take track daying really seriously.
In which case, you’ll love the manually adjustable suspension. It’s weapons-grade stuff, helping the GTS lap the Nurburgring in 7mins 24secs, a whopping 24secs quicker than the standard car and the same as the Porsche Carrera GT. Safe to say it handles well.
And stop well, with standard carbon ceramic brakes hiding behind the partly orange 19in front and 20in rear wheels which wear super-sticky Michelin Pilot Sport Cup 2 developed specifically for the GTS.
Elsewhere, there’s adaptive LED headlights and BMW‘s new OLED rear lights, which allow prettier patterns; big splitter and mahoosive rear spoiler, adjustable through three settings and a titanium exhaust system with four 80mm tailpipes. Not so much an exhaust as an artillery battery.
Just 700 examples of the BMW M4 GTS will be built, only 30 will make to the UK. And they won’t be cheap with an asking price of £121,770, around twice the price of a standard M4. Still, it’ll probably be one of the few cars that never depreciates. So you could argue it’s a good investment.
Although it’s probably a mute point, as we suspect the entire UK allocation will have sold out by the time you finish reading this.
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By Only Motors