The BMW 6 Series Convertible (E64), specifically the 630i variant produced from 2007 to 2010, represented a significant iteration of BMW’s luxury convertible grand tourer. This facelifted version of the E64, part of the broader E63/E64 6 Series generation (2003-2010), aimed to refine the original’s styling and address some criticisms regarding its interior and overall refinement. The 630i, positioned as the entry point to the 6 Series Convertible range, offered a balance of performance and luxury, appealing to buyers seeking a sophisticated open-top experience without the higher price tag of the 650i. It was built upon the BMW E63/E64 platform, sharing its core architecture with the 6 Series Coupe.
Technical Specifications
| Brand | BMW |
| Model | 6 Series |
| Generation | 6 Series Convertible (E64, facelift 2007) |
| Type (Engine) | 630i (272 Hp) |
| Start of production | 2007 |
| End of production | 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (economy) – urban (NEDC) | 11.8 l/100 km (19.9 US mpg, 23.9 UK mpg, 8.5 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 6.3 l/100 km (37.3 US mpg, 44.8 UK mpg, 15.9 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 8.3 l/100 km (28.3 US mpg, 34 UK mpg, 12 km/l) |
| CO2 emissions (NEDC) | 198 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.7 sec |
| Acceleration 0 – 62 mph | 6.7 sec |
| Acceleration 0 – 60 mph | 6.4 sec |
| Maximum speed | 250 km/h (155.34 mph), Electronically limited |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 6.4 kg/Hp, 156.3 Hp/tonne |
| Weight-to-torque ratio | 5.4 kg/Nm, 183.9 Nm/tonne |
| Power | 272 Hp @ 6700 rpm |
| Power per litre | 90.8 Hp/l |
| Torque | 320 Nm @ 2750-3000 rpm (236.02 lb.-ft. @ 2750-3000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N53B30A |
| Engine displacement | 2996 cm3 (182.83 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 85 mm (3.35 in.) |
| Piston Stroke | 88 mm (3.46 in.) |
| Compression ratio | 12:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC, Double-VANOS |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 10.5 l (11.1 US qt | 9.24 UK qt) |
| Kerb Weight | 1740 kg (3836.04 lbs.) |
| Max. weight | 2140 kg (4717.89 lbs.) |
| Max load | 400 kg (881.85 lbs.) |
| Trunk (boot) space – minimum | 300 l (10.59 cu. ft.) |
| Trunk (boot) space – maximum | 350 l (12.36 cu. ft.) |
| Fuel tank capacity | 70 l (18.49 US gal | 15.4 UK gal) |
| Length | 4820 mm (189.76 in.) |
| Width | 1855 mm (73.03 in.) |
| Width including mirrors | 2036 mm (80.16 in.) |
| Height | 1373 mm (54.06 in.) |
| Wheelbase | 2780 mm (109.45 in.) |
| Front track | 1558 mm (61.34 in.) |
| Rear (Back) track | 1596 mm (62.83 in.) |
| Front overhang | 942 mm (37.09 in.) |
| Rear overhang | 1098 mm (43.23 in.) |
| Drag coefficient (Cd) | 0.31 |
| Minimum turning circle (turning diameter) | 11.4 m (37.4 ft.) |
| 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 | 6 gears, manual transmission |
| Front suspension | Spring Strut, Transverse stabilizer |
| Rear suspension | Independent multi-link suspension, Transverse stabilizer |
| Front brakes | Ventilated discs, 348×30 mm |
| Rear brakes | Ventilated discs, 345×24 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | Front wheel tires: 245/50 R17; 245/45 R18; 245/40 R19Rear wheel tires: 245/50 R17; 245/45 R18; 275/40 R18; 275/35 R19 |
| Wheel rims size | Front wheel rims: 7.5J x 17; 8J x 18; 8.5J x 19Rear wheel rims: 7.5J x 17; 8J x 18; 9J x 18; 9J x 19 |
INTRODUCTION
The 630i Convertible, introduced with the 2007 facelift, was powered by the naturally aspirated 3.0-liter N53B30A inline-six engine. This engine produced 272 horsepower and 236 lb-ft of torque. It served as the more accessible entry point into the 6 Series Convertible lineup, positioned below the more powerful 650i. The facelift brought subtle styling changes, including revised headlights and taillights, along with interior upgrades aimed at improving perceived quality and usability. The E64 630i aimed to deliver a blend of open-air motoring enjoyment, BMW’s renowned handling characteristics, and a degree of luxury.
Powertrain & Engine Architecture
The heart of the 630i Convertible is the N53B30A engine, a 2996cc (182.83 cu. in.) naturally aspirated inline-six. This engine utilizes direct fuel injection, a technology that improves fuel efficiency and power output compared to traditional port fuel injection. The N53 engine also features BMW’s Double-VANOS variable valve timing system, which optimizes valve timing for both intake and exhaust valves, enhancing performance across the rev range. The engine’s aluminum alloy block and head contribute to its relatively lightweight construction. The 630i was typically paired with a 6-speed manual transmission, but a 6-speed automatic transmission was also available, and was a popular choice for buyers prioritizing comfort and ease of use. The automatic transmission featured adaptive shift programs, adjusting shift points based on driving style.
Driving Characteristics
The 630i Convertible, while not as overtly powerful as the 650i, offered a rewarding driving experience. Acceleration from 0-60 mph took around 6.4 seconds, and the car felt responsive in everyday driving situations. The automatic transmission, while smooth, could sometimes feel hesitant during quick downshifts. The 630i’s suspension provided a comfortable ride, but also maintained good body control in corners. The rear-wheel-drive configuration contributed to the car’s balanced handling characteristics. Compared to the 650i, the 630i felt less urgent in its acceleration, but its lighter weight and more manageable power delivery made it a more approachable and enjoyable car for many drivers. The manual transmission offered a more engaging driving experience, allowing for greater control over the engine’s power.
Equipment & Trim Levels
The 630i Convertible came standard with a generous array of features, including leather upholstery, power-adjustable seats, automatic climate control, and a premium sound system. Optional extras included features like active steering, sport seats, a head-up display, and a logic7 surround sound system. The convertible top was a multi-layer fabric soft top that could be raised or lowered electrically. Interior trim options included various wood veneers and aluminum accents. The standard wheels were 17-inch alloy wheels, with larger 18- and 19-inch wheels available as options. The 630i was generally equipped with a more restrained level of luxury compared to the 650i, focusing on providing a comfortable and well-equipped driving environment without the more extravagant features.
Chassis & Braking
The E64 630i Convertible utilized a sophisticated chassis design. The front suspension featured MacPherson struts with a transverse stabilizer bar, while the rear suspension employed an independent multi-link setup, also with a stabilizer bar. This configuration provided a good balance of ride comfort and handling precision. The braking system consisted of ventilated disc brakes on all four wheels. ABS (Anti-lock Braking System) was standard. The 630i’s weight distribution was close to 50/50, contributing to its balanced handling. The steering system was a hydraulic rack-and-pinion setup, providing precise and responsive steering feel.
Market Reception & Comparison
The 630i Convertible was generally well-received by automotive critics. It was praised for its stylish design, comfortable ride, and engaging driving dynamics. However, some critics noted that the engine, while capable, lacked the outright punch of the 650i’s V8. Fuel economy was considered reasonable for a luxury convertible of its size and performance. Compared to the 650i, the 630i offered a more affordable entry point into the 6 Series Convertible range, making it appealing to a wider range of buyers. Its reliability was generally good, although some owners reported issues with the electronic systems and convertible top mechanism.
Legacy
The E64 630i Convertible has become a sought-after used car, particularly among enthusiasts who appreciate its classic styling and engaging driving experience. The N53 engine, while generally reliable, can be prone to certain issues, such as fuel injector failure and cooling system leaks, requiring preventative maintenance. The convertible top mechanism can also require attention over time. Despite these potential issues, the 630i Convertible remains a desirable and relatively affordable way to experience BMW’s luxury convertible grand touring heritage. Its blend of style, performance, and comfort continues to appeal to drivers seeking a sophisticated open-top motoring experience.
