2007-2010 BMW M6 Convertible (E64 LCI facelift ) 5.0 V10 (500 Hp)

The BMW M6 Convertible (E64 LCI), specifically the facelifted version produced from 2007 to 2010, represents the high-performance, open-top iteration of BMW’s flagship 6-Series. Powered by the S85B50A 5.0-liter V10 engine producing 500 horsepower, it was positioned as the ultimate expression of luxury and performance within the E64 generation. The “LCI” (Life Cycle Impulse) designation signifies a mid-production refresh, bringing styling updates and minor mechanical revisions to the original E64 M6 introduced in 2005. This variant aimed to deliver an exhilarating driving experience combined with the prestige associated with the M6 nameplate, appealing to enthusiasts seeking a unique blend of power, handling, and open-air motoring.

Technical Specifications

INTRODUCTION

The E64 M6 Convertible, and particularly the 2007-2010 LCI version, was BMW’s answer to those seeking a truly high-performance luxury convertible. Built on the E63/E64 6-Series platform, it shared its core structure with the coupe but added the complexity and weight of a retractable hardtop. The S85 V10 engine, derived from the M5, was the centerpiece, offering a unique and sonorous driving experience. The LCI facelift brought subtle but noticeable changes to the exterior, including revised headlights and taillights, along with interior refinements. This model occupied the top tier of the 6-Series range, positioned above the 645i and 650i, and aimed to compete with grand tourers from Porsche and Mercedes-Benz.

Powertrain & Engine Architecture

The heart of the M6 Convertible is the S85B50A 5.0-liter naturally aspirated V10 engine. This engine, a significant departure from BMW’s traditional inline-six layouts, was designed to deliver high power and a thrilling driving experience. It features individual throttle bodies for each cylinder, contributing to its sharp throttle response. The engine utilizes double-VANOS (variable valve timing) for both intake and exhaust valves, optimizing performance and efficiency across the rev range. Fuel is delivered via a multi-port fuel injection system. The engine’s architecture is longitudinally mounted at the front of the vehicle, driving the rear wheels. The standard transmission for the LCI M6 was a 6-speed manual, though a 7-speed SMG (Sequential Manual Gearbox) was also available. The SMG, while offering faster shifts, was often criticized for its jerky low-speed behavior.

Driving Characteristics

The M6 Convertible, even with the added weight of the convertible top mechanism, delivers impressive performance. The 500 horsepower and 383 lb-ft of torque provide exhilarating acceleration, with 0-60 mph times consistently around 4.6 seconds. The engine’s powerband is broad, but it truly comes alive above 5,000 rpm, rewarding drivers who enjoy exploring the upper reaches of the tachometer. The manual transmission offers precise shifts and a direct connection to the engine, while the SMG, when functioning optimally, provides rapid gear changes. The car’s weight distribution is relatively balanced, contributing to its neutral handling characteristics. However, the added weight compared to the coupe is noticeable, particularly during hard cornering. The steering is precise and communicative, providing ample feedback to the driver.

Equipment & Trim Levels

The M6 Convertible came standard with a comprehensive list of luxury and performance features. Interior appointments included leather upholstery, power-adjustable heated seats, a premium sound system, and automatic climate control. Standard exterior features included M-specific aerodynamic enhancements, such as a front air dam, side skirts, and a rear diffuser. Optional extras included carbon fiber trim, upgraded leather options, a head-up display, and active suspension. The LCI facelift brought minor interior refinements, including updated trim materials and revised switchgear. The convertible top was fully automatic and insulated for reasonable noise isolation when raised.

Chassis & Braking

The M6 Convertible’s chassis was specifically tuned to handle the increased power and weight of the V10 engine. It features a reinforced suspension system with stiffer springs and dampers compared to the standard 6-Series. The front suspension utilizes a spring strut design with a transverse stabilizer, while the rear suspension employs an independent multi-link setup, also with a stabilizer bar. Braking duties are handled by large, ventilated disc brakes at all four corners, providing ample stopping power. The ABS (Anti-lock braking system) is standard. The car rides on staggered-width alloy wheels, with wider tires at the rear to enhance traction.

Market Reception & Comparison

The M6 Convertible was generally well-received by automotive critics, who praised its powerful engine, engaging driving dynamics, and luxurious interior. However, the car’s high price tag and relatively complex mechanicals were points of concern. Compared to the M6 Coupe, the Convertible offered a more open-air driving experience but suffered from a slight performance penalty due to its added weight. Compared to competitors like the Porsche 911 Turbo Cabriolet, the M6 offered a more luxurious and comfortable ride, but lacked the Porsche’s ultimate track performance. Fuel economy was predictably poor, averaging around 13 mpg in combined driving.

Legacy

The E64 M6 Convertible, particularly the LCI version, remains a desirable vehicle among enthusiasts. The S85 V10 engine is highly regarded for its unique sound and performance characteristics. However, the engine’s complexity and the car’s overall mechanical sophistication mean that maintenance can be expensive. Common issues include VANOS failures, oil leaks, and SMG gearbox problems (on cars equipped with that transmission). Despite these potential issues, well-maintained examples of the E64 M6 Convertible are holding their value and are increasingly sought after by collectors and enthusiasts who appreciate its blend of performance, luxury, and exclusivity.