The BMW 745d, part of the E65 generation 7 Series produced from 2005 to 2008, represented BMW’s foray into high-performance diesel luxury sedans. Positioned as a mid-to-upper trim level within the E65 range, it offered a compelling blend of power, efficiency, and refinement. The “d” designation signified a diesel engine, and the “45” indicated its approximate engine displacement in deciliters. This variant was primarily aimed at the European market, where diesel engines enjoyed significant popularity due to favorable taxation and fuel economy. The 745d, with its potent 4.4-liter V8 diesel, offered a sophisticated alternative to its gasoline-powered siblings, appealing to drivers seeking strong performance without sacrificing fuel efficiency.
Technical Specifications
| Brand | BMW |
| Model | 7 Series |
| Generation | 7 Series (E65, facelift 2005) |
| Type (Engine) | 745d (330 Hp) Steptronic |
| Start of production | 2005 |
| End of production | 2008 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 12.8 l/100 km (18.4 US mpg, 22.1 UK mpg, 7.8 km/l) |
| Fuel consumption (extra urban) | 6.8 l/100 km (34.6 US mpg, 41.5 UK mpg, 14.7 km/l) |
| Fuel consumption (combined) | 9 l/100 km (26.1 US mpg, 31.4 UK mpg, 11.1 km/l) |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.6 sec |
| Acceleration 0 – 62 mph | 6.6 sec |
| Acceleration 0 – 60 mph | 6.3 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 6.2 kg/Hp, 161.8 Hp/tonne |
| Weight-to-torque ratio | 2.7 kg/Nm, 367.6 Nm/tonne |
| Power | 330 Hp @ 3800 rpm |
| Torque | 750 Nm @ 1900-2500 rpm (553.17 lb.-ft. @ 1900-2500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M67D44 |
| Engine displacement | 4423 cm3 (269.91 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 87 mm (3.43 in.) |
| Piston Stroke | 93 mm (3.66 in.) |
| Compression ratio | 17:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Twin-Turbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 9.5 l (10.04 US qt, 8.36 UK qt) |
| Coolant | 16.5 l (17.44 US qt, 14.52 UK qt) |
| Kerb Weight | 2040 kg (4497.43 lbs.) |
| Max. weight | 2620 kg (5776.11 lbs.) |
| Max load | 580 kg (1278.68 lbs.) |
| Trunk (boot) space – minimum | 500 l (17.66 cu. ft.) |
| Fuel tank capacity | 88 l (23.25 US gal, 19.36 UK gal) |
| Length | 5039 mm (198.39 in.) |
| Width | 1902 mm (74.88 in.) |
| Height | 1491 mm (58.7 in.) |
| Wheelbase | 2990 mm (117.72 in.) |
| Front track | 1578 mm (62.13 in.) |
| Rear (Back) track | 1596 mm (62.83 in.) |
| Drag coefficient (Cd) | 0.29 |
| Minimum turning circle | 12.1 m (39.7 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 6 gears, automatic transmission Steptronic |
| Front suspension | Spring Strut |
| 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 | 245/50 R18 |
| Wheel rims size | 18 |
Powertrain & Engine Architecture
The heart of the 745d is the M67D44, a 4.4-liter V8 diesel engine. This engine utilized a common rail direct injection system, delivering fuel at extremely high pressure for optimized combustion. Two variable geometry turbochargers, along with an intercooler, were employed to maximize power and torque while minimizing turbo lag. The engine featured a double overhead camshaft (DOHC) valvetrain with four valves per cylinder, contributing to its efficient breathing and high output. The compression ratio was a high 17:1, typical for diesel engines, further enhancing efficiency. Paired with the engine was a six-speed Steptronic automatic transmission, offering smooth and responsive gear changes. This transmission was designed to handle the substantial torque output of the diesel V8 and provided both fully automatic operation and manual shift capabilities.
Driving Characteristics
The 745d offered a distinctly different driving experience compared to its gasoline-powered counterparts. The abundant 750 Nm (553 lb-ft) of torque, available from a low 1900 rpm, provided effortless acceleration and strong in-gear performance. While not as outright quick as the 750i, the 745d felt remarkably composed and capable, particularly during highway overtaking. The Steptronic transmission, while smooth, was tuned for comfort rather than aggressive shifts. The gear ratios were optimized for fuel efficiency and relaxed cruising, rather than maximizing acceleration. Compared to the 730d (with its smaller inline-six diesel), the 745d offered a significant power upgrade and a more refined driving experience. It also provided a more economical alternative to the 750i, without sacrificing a substantial amount of performance.
Equipment & Trim Levels
The 745d typically came well-equipped, reflecting its position as a luxury vehicle. Standard features included leather upholstery, power-adjustable front seats with memory function, automatic climate control, a premium sound system, and a navigation system. Xenon headlights, rain-sensing wipers, and a sunroof were also common. Optional extras included upgraded leather trim, rear seat entertainment, active suspension, and various driver assistance systems. The interior design was characterized by high-quality materials and a focus on comfort and ergonomics. The dashboard layout was typical of BMW at the time, with a driver-focused design and intuitive controls.
Chassis & Braking
The E65 7 Series featured a robust chassis with a MacPherson strut front suspension and a multi-link rear suspension. The 745d, due to its higher weight, often received slightly stiffer spring rates and dampers compared to the lighter models. Braking duties were handled by ventilated disc brakes at all four corners, coupled with an Anti-lock Braking System (ABS). The braking system was generally considered effective, providing ample stopping power and good pedal feel. Hydraulic power steering provided precise and responsive steering feel.
Market Reception & Comparison
The 745d was generally well-received by automotive critics, who praised its powerful engine, refined ride, and impressive fuel economy. It was seen as a compelling alternative to the gasoline-powered 7 Series models, particularly for drivers who prioritized efficiency and torque. Compared to the 730d, the 745d offered a noticeable performance advantage, but at a higher price point. Against competitors like the Mercedes-Benz S320 CDI and the Audi A8 3.0 TDI, the 745d held its own, offering a similar blend of luxury, performance, and efficiency. However, some critics noted that the Steptronic transmission could feel slightly hesitant at times.
Legacy
The M67D44 engine, while robust, is known to require diligent maintenance, particularly regarding the cooling system and turbochargers. The diesel particulate filter (DPF) can also be a potential source of issues if not properly maintained. However, when well-maintained, these engines are capable of high mileage. Today, the E65 745d represents an interesting proposition in the used car market. It offers a significant amount of luxury and performance for its price, but potential buyers should be aware of the potential maintenance costs associated with a high-performance diesel engine. The 745d remains a testament to BMW’s engineering prowess and its commitment to delivering a unique driving experience.
