The peak of M Division and AMG was the peak full stop.
Around 2011, BMW and Mercedes each produced a limited, extreme performance car that almost no one bought — the M3 GTS and C63 Black Series — priced beyond the reach of a world still nursing financial wounds. Fifteen years on, these naturally aspirated V8 machines have been quietly reappraised as the high-water mark of a particular philosophy: that driver engagement, mechanical purity, and raw engine character could coexist with road legality. They arrived at the end of an era neither their makers nor their buyers fully recognised as ending, and their scarcity now feels less like commercial failure and more like historical inevitability.
- Two cars priced above £120,000 each launched into a post-financial-crisis market that could barely afford to look at them, leaving the M3 GTS short of its 150-unit target and the C63 Black Series fighting for relevance against cheaper rivals.
- The tension is not just commercial — it is existential: these were among the last performance cars built without turbochargers, electric motors, or driving-mode menus, making every subsequent M and AMG model a quiet departure from what they represented.
- On the road, both cars confound their reputations — the brutish Mercedes steers with unexpected delicacy, the track-focused BMW beguiles with road-going poise, and neither requires electronic assistance to reward a driver willing to learn their rhythms.
- Values have climbed sharply as the industry accelerates toward electrification, transforming what were once slow-selling embarrassments into sought-after relics of mechanical authenticity.
- For those priced out of the originals, the standard C63 with a locking differential and the E92 M3 with GTS gearbox software offer a meaningful echo of the experience — a reminder that the engines alone were the point.
Around 2011, BMW and Mercedes each built something they believed would sell on merit alone. The M3 GTS arrived with a stroked 4.4-litre V8 screaming to 8,300 rpm, 450 horsepower, and a price of £117,630 — more than double a standard M3. The C63 Black Series went further still: 517 horsepower, £138,514, and an attitude that seemed to dare the market to keep up. Both were naturally aspirated, both were mechanical to their cores, and almost nobody bought them.
The GTS reads like a race car someone forgot to finish making road-legal — polycarbonate windows, titanium exhaust, exposed fasteners, Recaro seats, and a pre-iDrive dashboard that is beautiful in its austerity. The C63 Black Series is its opposite: a brute in a suit, muscular and leather-lined, looking like it should handle with the finesse of a sledgehammer but somehow refusing to.
What separates them from everything that followed is what happens when you drive them. The BMW's engine feels like the standard 4.0-litre with the intensity dialled to eleven — that chase to 8,300 rpm fiercer, the sound through titanium pipes smooth yet savage. The Mercedes may possess the more intoxicating engine of the two: the 6.2-litre delivers muscle-car torque while revving with the freedom of something half its size, accelerating by 5,000 rpm with the force of an avalanche and sounding like a NASCAR highlight reel.
There are no driving modes, no electronic wizardry to hide behind. The C63's steering is delicate and subtle in stark contrast to its exterior. The M3's rack is faster and more feelsome than the standard E92's. On a B-road, both confound expectations — the AMG turns with surprising agility, the M car beguiles with precision, and when you want to drift, neither requires persuasion.
Few will spend £150,000 on either car today, but the standard models they were built from remain accessible, and much of the engine character carries over with the right specification choices. The future belongs to turbocharged and electric performance. The M3 GTS and C63 Black Series stand as the last naturally aspirated heroes — icons of an era that ended before most people noticed it had begun.
There was a moment, around 2011, when BMW and Mercedes each built something they thought would sell itself. The M3 GTS arrived with a 4.4-liter V8 screaming to 8,300 rpm, 450 horsepower, and a price tag of £117,630—more than double what you'd pay for a standard M3. The Mercedes C63 Black Series came in even hotter: 517 horsepower from a 6.2-liter engine, £138,514, and an attitude that seemed to dare you to afford it. Both were naturally aspirated, both were mechanical, both were built before turbochargers and electric motors became the default language of performance cars. And almost nobody bought them.
The M3 GTS managed to sell just 138 units when 150 were planned. The C63 Black Series fared better but still faced an uphill battle in a world still recovering from financial collapse. A Porsche 911 GT3 RS 4.0 cost less. A standard C-Class coupe was £30,000. The timing was brutal. Yet here we are, fifteen years later, and these two cars have become something unexpected: proof that the peak of M Division and AMG may have already passed, and that we didn't fully appreciate it when it was happening.
The GTS feels almost homemade in its extremity. Polycarbonate windows saved 70 kilograms. A titanium exhaust. Coilovers. The famous S65 V8 was stroked to 4.4 liters just for this car and one saloon variant. The WTCC-style spoiler is modest by modern standards. Recaro seats that could have come from a hot hatchback. Exposed fasteners. Sill graphics that look almost naive. The dash is pre-iDrive, beautifully built but startlingly basic. It reads like a race car that someone decided to make street-legal, then forgot to add the luxury bits. The C63 Black Series is the opposite: a brute in a suit, absurdly muscular yet wrapped in leather and infotainment screens, looking like it should drive with the finesse of a sledgehammer but somehow doesn't.
What matters is what happens when you drive them. The BMW's engine feels like pushing the standard 4.0-liter downhill at all times—the character unchanged, just the intensity dialed to eleven. That rush to 8,300 rpm feels fiercer. The torque bump, combined with the weight loss, transforms the mid-range. The sound through the titanium pipes is divine: smooth yet savage, mixing the rasp of a flat-plane V8 with the thunder of a cross-plane, making you want to keep chasing the shift lights. The Mercedes, though, might possess the more intoxicating engine. The 6.2-liter is a miracle of internal combustion, delivering muscle-car torque that the BMW can only dream of while revving with the abandon of an engine half its size. By 5,000 rpm on a generous throttle application, the Black Series has already captured your complete attention, accelerating with the force of an avalanche and sounding like a NASCAR season review. Those lighter internals—borrowed from the SLS—mean it romps to the limiter with a freedom and zeal no other M156 possesses.
The GTS's dual-clutch gearbox is immediate and immersive, the perfect complement to that sharp V8. The Mercedes's seven-speed automatic is less responsive, a bit dozy whether you choose the gears or it does, but once you understand its rhythm, you learn to live with it. The real revelation is how both cars handle. There are no driving modes, no electronic wizardry to hide behind. The steering in the C63 is delicate and subtle, starkly contrasted with that brawny exterior—it feels sophisticated despite looking like it should drive like a hammer. The M3's steering is faster than a standard E92 rack, undeniably more feelsome, connected and alive without ever being flighty. Both cars sit on coilovers, both weigh at least a tonne and a half, and both deliver rides that are firm but fair—purposeful and rigorous in a way that lets you focus on what the car is achieving rather than which mode you need to select.
On a B-road, they confound expectations at every turn. The traditional AMG is willing to turn with surprising agility. The classic M car, built with track use in mind, beguiles on the road with precision and poise. The C-Class is a mighty ground coverer. When you want to do second-gear skids, they're only too happy to oblige. The BMW oversteers with taut, millimeter-precise control. The Mercedes, once sideways, feels so natural and benign that it's a shame to bring it back—the combination of massive torque, a mechanical limited-slip differential, and senior tires making it a drifting demigod.
Few of us will spend £150,000 on an E92 3 Series or C204 C-Class, but many could be tempted by £20,000 to £30,000 for one of the standard cars these were built from. The thrill won't be quite the same, but there isn't a day that wouldn't be improved by exposure to these engines, even in a more modest tune. Ensure a C63 has a locking differential and an M3 has the GTS gearbox software, and a significant portion of the appeal carries over. The future belongs to turbocharged and electric performance cars. The M3 GTS and C63 Black Series stand as icons of a different era—the last naturally aspirated heroes before everything changed.
Notable Quotes
The M3 GTS didn't sell out—only 138 were produced when 150 were planned, as the £120,000 asking price was too much for a world still reeling from financial catastrophe.— PistonHeads analysis
The C63 Black Series is a brute in a suit—absurdly muscular yet wrapped in leather and infotainment, looking like it should drive with the finesse of a sledgehammer but somehow doesn't.— PistonHeads analysis
The Hearth Conversation Another angle on the story
Why do you think these cars failed to sell when they were new?
The timing was catastrophic. The financial crisis had just ended. A Porsche 911 GT3 RS cost less and had a legendary name. A standard C-Class was £30,000. Asking £120,000 for a special edition felt almost insulting to people who'd just lost their savings.
But they're valuable now. What changed?
We realized what we'd lost. Naturally aspirated V8s are gone. Mechanical engagement is gone. These cars represent the last moment before turbochargers and electric motors became mandatory. Rarity helps—only 138 M3 GTSes were made—but it's more than that. They're proof that peak performance might have already happened.
The GTS looks almost homemade compared to the Mercedes.
That's exactly the point. It feels like a race car someone decided to make street-legal, then forgot to add luxury. Polycarbonate windows, titanium exhaust, Recaro seats from a hot hatchback. The dash is pre-iDrive. But that rawness is what makes it special now. It's honest in a way modern cars aren't.
Which engine is better?
The Mercedes is probably more impressive—more torque, more drama, sounds like a NASCAR season. But the BMW's engine is stranger and more addictive. It feels like driving the standard 4.0-liter downhill at all times. The intensity is just higher. The sound is divine.
Can you still buy one and enjoy it?
Absolutely. A standard M3 or C63 from that era costs £20,000 to £30,000. You won't get the GTS gearbox or the Black Series engine, but you'll get the same fundamental character. The steering, the mechanical feel, the absence of electronic interference—that's all there. These cars made you fall in love with driving again.
Do you think we'll see cars like this again?
Not in the same way. AMG and M are still making special cars, but they'll be turbocharged or electric. The naturally aspirated V8 is finished. That's why these two matter so much now. They're the last of something.