The BMW 840i 4.0, produced between 1993 and 1996, represents a compelling blend of luxury and performance within the E31 8 Series generation. Positioned as a mid-range offering in the 8 Series lineup, it served as a more accessible entry point to the flagship coupe compared to the range-topping 850i. The 840i 4.0 aimed to deliver a refined grand touring experience, balancing the sophisticated styling of the E31 with a potent, naturally aspirated V8 engine. It was primarily marketed towards buyers seeking a high-performance luxury coupe without the ultimate price tag of the 850i, and offered a more engaging driving experience than the later, heavier V12 models.
Technical Specifications
| Brand | BMW |
| Model | 8 Series |
| Generation | 8 Series (E31) |
| Type (Engine) | 840i 4.0 (286 Hp) |
| Start of production | 1993 |
| End of production | 1996 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (economy) – urban | 19.2 l/100 km (12.3 US mpg) |
| Fuel consumption (economy) – extra urban | 9 l/100 km (26.1 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 6.9 sec |
| Acceleration 0 – 62 mph | 6.9 sec |
| Acceleration 0 – 60 mph | 6.6 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Weight-to-power ratio | 6.2 kg/Hp |
| Weight-to-torque ratio | 4.5 kg/Nm |
| Power | 286 Hp @ 5800 rpm |
| Torque | 400 Nm @ 4500 rpm (295.02 lb.-ft. @ 4500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M60B40 |
| Engine displacement | 3982 cm3 (243 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 89 mm (3.5 in.) |
| Piston Stroke | 80 mm (3.15 in.) |
| Compression ratio | 10:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 7.5 l (7.93 US qt | 6.6 UK qt) |
| Coolant | 12.5 l (13.21 US qt | 11 UK qt) |
| Kerb Weight | 1780 kg (3924.23 lbs.) |
| Max. weight | 2180 kg (4806.08 lbs.) |
| Max load | 400 kg (881.85 lbs.) |
| Trunk (boot) space – minimum | 320 l (11.3 cu. ft.) |
| Fuel tank capacity | 90 l (23.78 US gal | 19.8 UK gal) |
| Length | 4780 mm (188.19 in.) |
| Width | 1855 mm (73.03 in.) |
| Height | 1340 mm (52.76 in.) |
| Wheelbase | 2648 mm (104.25 in.) |
| Front track | 1554 mm (61.18 in.) |
| Rear (Back) track | 1562 mm (61.5 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 | 6 gears, manual transmission |
| Front suspension | Wishbone |
| Rear suspension | Coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 235/50 R16 |
| Wheel rims size | 16 |
INTRODUCTION
The BMW 840i 4.0 emerged as a key variant within the E31 8 Series, produced from 1993 to 1996. The E31 platform, launched in 1989, was BMW’s attempt to create a technologically advanced and luxurious grand tourer to replace the aging 6 Series. The 840i 4.0 occupied a middle ground, offering a significant performance upgrade over the initial 830i while remaining more attainable than the flagship 850i models. It was designed to appeal to drivers who desired a powerful and refined coupe experience, prioritizing driver engagement alongside luxury appointments. The 840i 4.0 was available with either a 6-speed manual or a 5-speed automatic transmission, with the manual being favored by enthusiasts.
Powertrain & Engine Architecture
At the heart of the 840i 4.0 lies the M60B40 engine, a 3,982 cc (243 cubic inch) naturally aspirated V8. This engine is a cornerstone of BMW’s early 1990s performance lineup. The M60B40 features a cast iron block with an aluminum cylinder head, employing dual overhead camshafts (DOHC) and four valves per cylinder. Fuel delivery is managed by a Bosch Motronic 1.7 multi-port fuel injection system, ensuring precise fuel metering for optimal performance and efficiency. The engine produces 286 horsepower at 5,800 rpm and 400 Nm (295 lb-ft) of torque at 4,500 rpm. The 6-speed manual transmission (Getrag 295) offered precise shifts and enhanced driver control, while the 5-speed automatic (ZF 5HP30) provided smooth and convenient gear changes. The automatic transmission was programmed for a balance of comfort and performance, with adaptive shift patterns.
Driving Characteristics
The 840i 4.0 delivers a distinctly grand touring experience. The M60B40 engine provides ample power for effortless cruising and spirited acceleration. The 0-60 mph sprint takes approximately 6.6 seconds, and it can achieve a top speed of 155 mph (limited). Compared to the 850i, the 840i 4.0 feels more nimble and responsive, thanks to its slightly lower weight. The manual transmission version offers a more engaging driving experience, allowing for precise control over the engine’s power band. The automatic transmission, while smooth, can feel slightly less responsive. The suspension is tuned for comfort, providing a smooth ride over most road surfaces, but it also maintains good body control during cornering. The steering is precise and well-weighted, offering good feedback to the driver.
Equipment & Trim Levels
The 840i 4.0 came standard with a comprehensive list of luxury features. Interior appointments included leather upholstery, power-adjustable front seats with memory function, automatic climate control, and a high-quality sound system. Standard exterior features included alloy wheels, a sunroof, and fog lights. Optional extras included upgraded leather trim, a premium sound system, a navigation system (a rarity for the time), and a self-leveling suspension. The interior design emphasized a driver-focused layout, with all controls within easy reach. The dashboard featured wood trim and a clear, analog instrument cluster.
Chassis & Braking
The E31 8 Series chassis is a robust and well-engineered platform. The 840i 4.0 utilizes a fully independent suspension system, with wishbone suspension at the front and a semi-trailing arm suspension at the rear. The braking system consists of ventilated disc brakes at all four corners, providing ample stopping power. Anti-lock braking system (ABS) is standard. The 840i 4.0 features a hydraulic power steering system, offering precise and responsive steering feel. The car’s weight distribution is nearly 50/50, contributing to its balanced handling characteristics.
Market Reception & Comparison
The 840i 4.0 was generally well-received by automotive critics. It was praised for its powerful engine, luxurious interior, and refined driving experience. However, some critics noted that the car was expensive, even compared to other luxury coupes. Compared to the 850i, the 840i 4.0 offered a better balance of performance and value. The 830i, the entry-level model, lacked the performance of the 840i 4.0, making the 840i 4.0 the preferred choice for many buyers. Fuel economy, while not a primary concern for buyers in this segment, was reasonable for a V8-powered coupe of its size and performance.
Legacy
The BMW 840i 4.0 has become a sought-after classic among BMW enthusiasts. The M60B40 engine is known for its reliability and durability, although regular maintenance is essential. The E31 8 Series, in general, is appreciated for its timeless design and advanced technology. Today, well-maintained 840i 4.0 models command a premium in the used car market. The car represents a high point in BMW’s grand touring heritage, offering a unique blend of luxury, performance, and style. Parts availability can be a challenge, but a dedicated community of enthusiasts ensures that support and resources are available for owners.
