The BMW M3 Convertible (E93 LCI), produced from March 2010 to September 2013, represents the facelifted version of the E93 generation, itself a part of the broader E90 M3 series. This variant, equipped with the naturally aspirated 4.0-liter V8 engine (S65B40A) producing 420 horsepower, occupied the top performance tier of the M3 Convertible lineup. The “LCI” (Life Cycle Impulse) designation signifies BMW’s mid-cycle refresh, bringing styling updates and minor mechanical revisions to the original E93 design. It was positioned as a premium offering, blending high-performance capabilities with open-air driving enjoyment.
Technical Specifications
| Brand | BMW |
| Model | M3 |
| Generation | M3 Convertible (E93 LCI, facelift 2010) |
| Type (Engine) | 4.0 V8 (420 Hp) |
| Start of production | March, 2010 |
| End of production | September, 2013 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Cabriolet |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (economy) – urban (NEDC) | 18 l/100 km (13.1 US mpg, 15.7 UK mpg, 5.6 km/l) |
| Fuel consumption (economy) – extra urban (NEDC) | 9.6 l/100 km (24.5 US mpg, 29.4 UK mpg, 10.4 km/l) |
| Fuel consumption (economy) – combined (NEDC) | 12.7 l/100 km (18.5 US mpg, 22.2 UK mpg, 7.9 km/l) |
| CO2 emissions (NEDC) | 297 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.3 sec |
| Acceleration 0 – 62 mph | 5.3 sec |
| Acceleration 0 – 60 mph | 5.1 sec |
| Acceleration 0 – 200 km/h | 18.2 sec |
| Maximum speed | 250 km/h (155.34 mph), Electronically limited |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 4.3 kg/Hp, 232 Hp/tonne |
| Weight-to-torque ratio | 4.5 kg/Nm, 221 Nm/tonne |
| Power | 420 Hp @ 8300 rpm |
| Power per litre | 105 Hp/l |
| Torque | 400 Nm @ 3900 rpm (295.02 lb.-ft. @ 3900 rpm) |
| Maximum engine speed | 8400 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | S65B40A |
| Engine displacement | 3999 cm3 (244.03 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 92 mm (3.62 in.) |
| Piston Stroke | 75.2 mm (2.96 in.) |
| Compression ratio | 12:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | Double-VANOS |
| Engine oil capacity | 8.8 l (9.3 US qt | 7.74 UK qt) |
| Coolant | 11.4 l (12.05 US qt | 10.03 UK qt) |
| Kerb Weight | 1810 kg (3990.37 lbs.) |
| Max. weight | 2280 kg (5026.54 lbs.) |
| Max load | 470 kg (1036.17 lbs.) |
| Trunk (boot) space – minimum | 210 l (7.42 cu. ft.) |
| Trunk (boot) space – maximum | 350 l (12.36 cu. ft.) |
| Fuel tank capacity | 63 l (16.64 US gal | 13.86 UK gal) |
| Length | 4615 mm (181.69 in.) |
| Width | 1804 mm (71.02 in.) |
| Width including mirrors | 1976 mm (77.8 in.) |
| Height | 1392 mm (54.8 in.) |
| Wheelbase | 2761 mm (108.7 in.) |
| Front track | 1540 mm (60.63 in.) |
| Rear (Back) track | 1539 mm (60.59 in.) |
| Front overhang | 805 mm (31.69 in.) |
| Rear overhang | 1049 mm (41.3 in.) |
| Drag coefficient (Cd) | 0.32 |
| Minimum turning circle (turning diameter) | 11.7 m (38.39 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 spring suspension with stabilizer |
| Front brakes | Ventilated discs, 360×30 mm |
| Rear brakes | Ventilated discs, 350×24 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | Front wheel tires: 245/40 R18; 245/35 R19 Rear wheel tires: 265/40 R18; 265/35 R19 |
| Wheel rims size | Front wheel rims: 8.5J x 18; 8.5J x 19 Rear wheel rims: 9.5J x 18; 9.5J x 19 |
Powertrain & Engine Architecture
The heart of the E93 LCI M3 Convertible is the S65B40A 4.0-liter naturally aspirated V8 engine. This engine, a significant departure from the inline-six engines previously used in M3s, is renowned for its high-revving character and linear power delivery. It features individual throttle bodies, a high 12:1 compression ratio, and BMW’s Double-VANOS variable valve timing system on both intake and exhaust camshafts. Fuel is delivered via multi-port fuel injection. The engine produces 420 hp at 8,300 rpm and 295 lb-ft of torque at 3,900 rpm. The standard transmission for this variant was a 6-speed manual, providing a direct connection to the rear wheels. While a dual-clutch transmission (DCT) was available on other M3 models, it wasn’t offered with the convertible.
Driving Characteristics
The 6-speed manual transmission in the E93 LCI M3 Convertible provides a satisfyingly mechanical driving experience. The gear ratios are well-matched to the engine’s powerband, allowing for strong acceleration throughout the rev range. Compared to the DCT-equipped M3s, the manual version offers a more engaging feel, but slightly slower shift times. The convertible body adds weight compared to the coupe, impacting handling slightly, but the well-tuned suspension – featuring spring struts at the front and a multi-link setup at the rear – minimizes body roll and maintains a composed ride. The steering is precise and communicative, providing ample feedback to the driver. Acceleration from 0-60 mph takes approximately 5.1 seconds, making it a genuinely quick car.
Equipment & Trim Levels
The E93 LCI M3 Convertible came well-equipped as standard. Interior features included leather upholstery, power-adjustable sport seats, a premium sound system, and automatic climate control. The LCI facelift brought subtle interior revisions, including updated trim materials and a revised iDrive system. Optional extras included features like heated seats, navigation, a head-up display, and carbon fiber interior trim. The convertible top was a power-operated hardtop, providing enhanced security and refinement compared to a soft top. Exterior options included various wheel designs and paint colors.
Chassis & Braking
The E93 M3 Convertible utilizes a reinforced chassis to compensate for the loss of structural rigidity inherent in a convertible design. The suspension features a sophisticated setup with adjustable dampers, allowing drivers to tailor the ride to their preferences. Braking duties are handled by ventilated discs at all four corners, providing ample stopping power. The front brakes measure 360x30mm, while the rear brakes are 350x24mm. ABS (Anti-lock Braking System) is standard. The car’s weight distribution is close to 50/50, contributing to balanced handling.
Market Reception & Comparison
The E93 LCI M3 Convertible was generally well-received by automotive critics. It was praised for its powerful engine, engaging driving dynamics, and luxurious interior. However, the convertible’s added weight and slightly compromised handling compared to the coupe were noted. Compared to other M3 variants, such as those with the DCT transmission, the manual version was favored by enthusiasts seeking a more traditional driving experience. Fuel economy, at 18.5 US mpg combined, was considered reasonable for a high-performance vehicle of this type, but CO2 emissions were relatively high at 297 g/km.
Legacy
The S65B40A V8 engine has proven to be a robust and reliable powerplant, although preventative maintenance is crucial. Regular oil changes and inspections are essential to avoid potential issues. The E93 LCI M3 Convertible has become a sought-after vehicle in the used car market, particularly among collectors and enthusiasts. Its combination of performance, luxury, and open-air driving enjoyment makes it a compelling choice for those seeking a high-performance convertible. Values have generally held well, reflecting the car’s desirability and limited production numbers. The E93 represents a unique chapter in the M3 lineage, being the only M3 convertible to feature a V8 engine.
