The BMW Z4 (E85) 2.2i, produced from 2003 to 2006, represents the entry point into the first generation of the Z4 roadster series. Positioned as the base model, it offered a more accessible price point compared to the higher-performance 3.0i variants. The E85 Z4 marked a return to BMW’s traditional two-seat roadster roots after the Z3, and was built on a new platform, offering improved rigidity and handling characteristics. This 2.2i model aimed to provide a balance of sporty driving dynamics and reasonable fuel economy, appealing to a broader customer base than its more powerful siblings.
Technical Specifications
| Brand | BMW |
| Model | Z4 |
| Generation | Z4 (E85) |
| Type (Engine) | 2.2i (170 Hp) |
| Start of production | 2003 |
| End of production | 2006 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Roadster |
| Seats | 2 |
| Doors | 2 |
| Fuel consumption (urban) | 10.7 l/100 km (22 US mpg, 26.4 UK mpg, 9.3 km/l) |
| Fuel consumption (extra urban) | 5.6 l/100 km (42 US mpg, 50.4 UK mpg, 17.9 km/l) |
| Fuel consumption (combined) | 7.3 l/100 km (32.2 US mpg, 38.7 UK mpg, 13.7 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.7 sec |
| Acceleration 0 – 62 mph | 7.7 sec |
| Acceleration 0 – 60 mph | 7.3 sec |
| Maximum speed | 225 km/h (139.81 mph) |
| Weight-to-power ratio | 7.8 kg/Hp, 128.3 Hp/tonne |
| Weight-to-torque ratio | 6.3 kg/Nm, 158.5 Nm/tonne |
| Power | 170 Hp @ 6100 rpm |
| Power per litre | 78.3 Hp/l |
| Torque | 210 Nm @ 3500 rpm (154.89 lb.-ft. @ 3500 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M54B22 |
| Engine displacement | 2171 cm3 (132.48 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 80 mm (3.15 in.) |
| Piston Stroke | 72 mm (2.83 in.) |
| Compression ratio | 10.8:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant capacity | 8.3 l (8.77 US qt | 7.3 UK qt) |
| Kerb Weight | 1325 kg (2921.12 lbs.) |
| Max. weight | 1550 kg (3417.17 lbs.) |
| Max load | 225 kg (496.04 lbs.) |
| Trunk (boot) space – minimum | 300 l (10.59 cu. ft.) |
| Fuel tank capacity | 55 l (14.53 US gal | 12.1 UK gal) |
| Length | 4091 mm (161.06 in.) |
| Width | 1781 mm (70.12 in.) |
| Height | 1299 mm (51.14 in.) |
| Wheelbase | 2495 mm (98.23 in.) |
| Front track | 1473 mm (57.99 in.) |
| Rear (Back) track | 1523 mm (59.96 in.) |
| Minimum turning circle | 9.8 m (32.15 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Drive wheel | Rear wheel drive |
| Number of gears | 6 gears, manual transmission |
| Front suspension | Spring Strut |
| Rear suspension | Coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 205/55 R16 |
| Wheel rims size | 7J x 16 |
Powertrain & Engine Architecture
The heart of the Z4 2.2i is the BMW M54B22, a 2.2-liter inline-six engine. This engine is a naturally aspirated powerplant, meaning it doesn’t rely on turbocharging or supercharging for increased power. It utilizes a double overhead camshaft (DOHC) valvetrain with four valves per cylinder, contributing to its smooth power delivery. Fuel is delivered via a multi-port fuel injection system, carefully metering gasoline into the intake ports. The M54 engine is known for its robust construction and relatively simple design, making it a reliable unit. The 2.2i was paired exclusively with a 6-speed manual transmission in the US market, offering precise gear changes and a direct connection to the engine. This transmission was chosen to enhance the driving experience and complement the engine’s characteristics.
Driving Characteristics
The Z4 2.2i delivers a balanced driving experience. While not as overtly powerful as the 3.0i models, the 170 horsepower and 155 lb-ft of torque provide ample power for spirited driving. Acceleration from 0-60 mph takes around 7.3 seconds, which was respectable for a roadster in its class. The 6-speed manual transmission allows drivers to fully exploit the engine’s powerband, keeping the engine in its optimal rev range. The rear-wheel drive configuration contributes to a sporty feel, providing excellent handling and balance. Compared to the 3.0i, the 2.2i offers a more relaxed driving experience, prioritizing comfort and fuel efficiency over outright performance. The gear ratios are tuned for a blend of acceleration and highway cruising, making it a versatile vehicle for both daily commutes and weekend drives.
Equipment & Trim Levels
The Z4 2.2i came with a reasonable level of standard equipment. Interior features typically included leatherette upholstery, power windows and locks, and a basic audio system. Air conditioning was standard. Optional extras included premium sound systems, heated seats, sport seats, and various cosmetic enhancements. The dashboard layout was driver-focused, with clearly arranged gauges and controls. The overall interior design was clean and functional, reflecting BMW’s commitment to practicality and ergonomics. The 2.2i trim generally served as the entry point, with buyers able to add options to personalize their vehicle.
Chassis & Braking
The Z4 E85 chassis was a significant improvement over its predecessor, the Z3. It featured a more rigid body structure, enhancing handling and safety. The front suspension utilized MacPherson struts, while the rear employed a multi-link setup, providing a comfortable yet controlled ride. Braking duties were handled by ventilated disc brakes on all four wheels, offering strong stopping power. Anti-lock Braking System (ABS) was standard. The suspension tuning was geared towards providing a balance between sporty handling and everyday comfort. The relatively lightweight construction of the 2.2i model contributed to its nimble handling characteristics.
Market Reception & Comparison
The Z4 2.2i was generally well-received by automotive critics. It was praised for its balanced handling, comfortable ride, and relatively affordable price point. However, some reviewers noted that the engine lacked the outright punch of the 3.0i models. Compared to the 3.0i, the 2.2i offered better fuel economy, making it a more practical choice for daily driving. It also had a lower purchase price, making it accessible to a wider range of buyers. Against competitors like the Porsche Boxster and Mercedes-Benz SLK, the Z4 2.2i offered a compelling combination of performance, value, and driving enjoyment.
Legacy
The M54B22 engine, found in the Z4 2.2i, has proven to be a remarkably reliable powerplant. With proper maintenance, these engines can easily exceed 150,000 miles. The Z4 E85, in general, has gained a following among enthusiasts who appreciate its classic roadster design and engaging driving dynamics. The 2.2i variant remains a relatively affordable entry point into Z4 ownership, making it a popular choice in the used car market. While not the fastest or most luxurious Z4 model, the 2.2i offers a rewarding driving experience and a timeless design that continues to appeal to car enthusiasts today. Common maintenance items include oil changes, coolant flushes, and occasional sensor replacements, but overall, the Z4 2.2i is considered a relatively easy car to maintain.
