The BMW M6 Convertible (F12M), produced from 2012 to 2014, represents the high-performance, open-top variant of the sixth-generation 6-Series. Positioned as the flagship convertible within BMW’s lineup, the F12M M6 aimed to deliver uncompromising performance and luxury. It was built upon the F12 6-Series platform, sharing its basic architecture but distinguished by significant mechanical upgrades and aggressive styling cues indicative of the “M” division’s focus. This generation marked a return to a more focused performance ethos after some criticism of the previous E64 M6 for being too heavily weighted towards grand touring comfort.
Technical Specifications
| Brand | BMW |
| Model | M6 |
| Generation | M6 Convertible (F12M) |
| Type (Engine) | 4.4 V8 (560 Hp) |
| Start of production | 2012 |
| End of production | 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (economy) – urban | 14.4 l/100 km (16.3 US mpg, 19.6 UK mpg, 6.9 km/l) |
| Fuel consumption (economy) – extra urban | 7.9 l/100 km (29.8 US mpg, 35.8 UK mpg, 12.7 km/l) |
| Fuel consumption (economy) – combined | 10.3 l/100 km (22.8 US mpg, 27.4 UK mpg, 9.7 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.3 sec |
| Acceleration 0 – 62 mph | 4.3 sec |
| Acceleration 0 – 60 mph | 4.1 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Weight-to-power ratio | 3.7 kg/Hp, 272.5 Hp/tonne |
| Weight-to-torque ratio | 3 kg/Nm, 330.9 Nm/tonne |
| Power | 560 Hp @ 6000-7000 rpm |
| Power per litre | 127.4 Hp/l |
| Torque | 680 Nm @ 1500-5750 rpm (501.54 lb.-ft. @ 1500-5750 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | S63B44B |
| Engine displacement | 4395 cm3 (268.2 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 89 mm (3.5 in.) |
| Piston Stroke | 88.3 mm (3.48 in.) |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 8.4 l (8.88 US qt | 7.39 UK qt) |
| Coolant | 18.5 l (19.55 US qt | 16.28 UK qt) |
| Kerb Weight | 2055 kg (4530.5 lbs.) |
| Max. weight | 2410 kg (5313.14 lbs.) |
| Max load | 355 kg (782.64 lbs.) |
| Fuel tank capacity | 80 l (21.13 US gal | 17.6 UK gal) |
| Length | 4898 mm (192.83 in.) |
| Width | 1899 mm (74.76 in.) |
| Height | 1368 mm (53.86 in.) |
| Wheelbase | 2851 mm (112.24 in.) |
| Front track | 1631 mm (64.21 in.) |
| Rear (Back) track | 1612 mm (63.46 in.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 7 gears, automatic transmission |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 265/40 ZR19 102Y; 295/35 ZR19 104Y |
| Wheel rims size | 9.5J x 19; 10.5J x 19 |
Powertrain & Engine Architecture
At the heart of the F12M M6 lies the S63B44B, a 4.4-liter twin-turbocharged V8 engine. This engine represents a significant evolution of the N63 engine found in other BMW models, but with substantial enhancements tailored for the M division’s performance requirements. Key features include direct fuel injection, a cross-bank exhaust manifold for improved turbocharger response, and a sophisticated cooling system designed to handle the increased thermal load. The twin-scroll turbochargers, positioned within the V of the engine, minimize turbo lag and deliver a broad, flat torque curve. The engine produces 560 horsepower at 6,000-7,000 rpm and a substantial 680 lb-ft of torque between 1,500 and 5,750 rpm. The engine is longitudinally mounted at the front of the vehicle. The F12M exclusively utilized a 7-speed M Double Clutch Transmission (M-DCT) with Drivelogic. This dual-clutch transmission offers incredibly fast and precise gear changes, contributing significantly to the car’s overall performance. Drivelogic allows the driver to select different shift programs, ranging from comfort-oriented smooth shifts to aggressive, track-focused rapid changes.
Driving Characteristics
The combination of the powerful V8 engine and the M-DCT transmission results in exhilarating acceleration. The F12M M6 can sprint from 0 to 60 mph in approximately 4.1 seconds, and its electronically limited top speed is 155 mph. The M-DCT’s programming prioritizes performance, holding gears longer and downshifting aggressively under braking. While the automatic transmission provides convenience, it doesn’t entirely mask the car’s substantial weight (over 4,500 lbs). Compared to a manual transmission equipped M6 (which wasn’t offered in the US market), the M-DCT offers quicker shifts but some purists argue it lacks the direct engagement of a traditional manual. The suspension is tuned for a balance between comfort and handling, providing a relatively compliant ride for a high-performance vehicle, while still offering excellent body control during spirited driving.
Equipment & Trim Levels
The M6 Convertible came generously equipped as standard. Interior features included leather upholstery, power-adjustable and heated front seats with memory function, a premium sound system, navigation, and a head-up display. Standard exterior features included M-specific aerodynamic enhancements, quad exhaust outlets, and unique alloy wheels. Optional extras were plentiful, including carbon fiber trim, upgraded leather options, active roll stabilization, and a driver assistance package with features like lane departure warning and blind-spot monitoring. The convertible top was a multi-layer soft top that could be raised or lowered in approximately 30 seconds at speeds up to 25 mph.
Chassis & Braking
The F12M M6 features a sophisticated chassis designed to maximize handling performance. The suspension utilizes a lightweight aluminum construction and incorporates adaptive dampers that adjust to road conditions and driving style. The front suspension employs a double-ball-joint setup for increased steering precision. The rear suspension features multi-link design. Braking duties are handled by large, ventilated discs at all four corners, with multi-piston calipers providing strong stopping power. The M6 is equipped with ABS, Dynamic Stability Control (DSC), and M Dynamic Mode, which allows for a more permissive level of wheel slip for experienced drivers.
Market Reception & Comparison
The F12M M6 Convertible was generally well-received by automotive critics. Praise was directed towards its powerful engine, responsive transmission, and refined driving experience. However, some reviewers noted the car’s considerable weight and the potential for the electronic stability control systems to intervene too aggressively. Compared to the M6 Coupe, the Convertible offered a more open-air driving experience but suffered a slight weight penalty due to the structural reinforcements required to maintain chassis rigidity. Fuel economy, while respectable for a vehicle of this performance, was not a strong point, averaging around 22.8 mpg combined.
Legacy
The F12M M6 Convertible represents a compelling blend of performance and luxury. The S63B44B engine has proven to be relatively reliable, although preventative maintenance, particularly regarding the cooling system and fuel injectors, is crucial. On the used car market, the F12M M6 Convertible commands a premium price, reflecting its exclusivity and performance capabilities. It remains a desirable vehicle for enthusiasts seeking a high-performance open-top grand tourer. The M-DCT transmission, while complex, has also proven durable with proper servicing. The F12M M6 stands as a testament to BMW’s engineering prowess and its commitment to delivering a thrilling driving experience.
