The BMW E91 318i Touring, produced from 2006 to 2007, represents BMW’s entry point into the sporty wagon segment during that generation. Positioned within the E91 3 Series Touring range, it offered a more accessible price point and focused on fuel efficiency compared to its more powerful siblings like the 325i and 335i. This variant aimed to provide the practicality of a station wagon with the BMW driving experience, appealing to families and individuals seeking a versatile vehicle. It was a key model in Europe, where the Touring (wagon) body style is particularly popular, but also saw limited sales in North America where wagons traditionally have a smaller market share.
Technical Specifications
| Brand | BMW |
| Model | 3 Series |
| Generation | 3 Series Touring (E91) |
| Type (Engine) | 318i (129 Hp) |
| Start of production | 2006 |
| End of production | 2007 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (economy) – urban | 10.5 l/100 km (22.4 US mpg) |
| Fuel consumption (economy) – extra urban | 5.9 l/100 km (39.9 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 10.4 sec |
| Acceleration 0 – 62 mph | 10.4 sec |
| Acceleration 0 – 60 mph | 9.9 sec |
| Maximum speed | 206 km/h (128 mph) |
| Weight-to-power ratio | 11.1 kg/Hp |
| Weight-to-torque ratio | 8 kg/Nm |
| Power | 129 Hp @ 5750 rpm |
| Torque | 180 Nm @ 3250 rpm (132.76 lb.-ft. @ 3250 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N46B20B |
| Engine displacement | 1995 cm3 (121.74 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 90 mm (3.54 in.) |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 4.25 l (4.49 US qt | 3.74 UK qt) |
| Coolant | 7.2 l (7.61 US qt | 6.34 UK qt) |
| Kerb Weight | 1435 kg (3163.63 lbs.) |
| Max. weight | 1970 kg (4343.11 lbs.) |
| Max load | 535 kg (1179.47 lbs.) |
| Trunk (boot) space – minimum | 460 l (16.24 cu. ft.) |
| Trunk (boot) space – maximum | 1385 l (48.91 cu. ft.) |
| Fuel tank capacity | 63 l (16.64 US gal | 13.86 UK gal) |
| Length | 4520 mm (177.95 in.) |
| Width | 1817 mm (71.54 in.) |
| Height | 1421 mm (55.94 in.) |
| Wheelbase | 2760 mm (108.66 in.) |
| Front track | 1500 mm (59.06 in.) |
| Rear (Back) track | 1513 mm (59.57 in.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 6 gears, manual transmission |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Coil spring |
| Front brakes | Disc |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Tires size | 205/55 R16 |
| Wheel rims size | 16 |
Powertrain & Engine Architecture
The E91 318i Touring was powered by the N46B20B, a 2.0-liter naturally aspirated inline-four cylinder engine. This engine was a mainstay in BMW’s lineup during the mid-2000s, known for its relatively smooth operation and decent fuel economy. The N46 featured double VANOS (variable valve timing) on both the intake and exhaust camshafts, optimizing performance and efficiency across the rev range. Fuel delivery was handled by a multi-port fuel injection system. The engine produced 129 horsepower at 5750 rpm and 180 Nm (132.76 lb-ft) of torque at 3250 rpm. The standard transmission was a 6-speed manual, though a 6-speed automatic transmission was also available, and was a popular choice for buyers prioritizing comfort and ease of use. The automatic transmission, while smooth, did slightly impact acceleration compared to the manual version.
Driving Characteristics
The 318i Touring, particularly with the manual transmission, offered a balanced driving experience. While not as exhilarating as the higher-powered 325i or 335i models, it provided sufficient power for everyday driving and comfortable highway cruising. The 0-60 mph time of around 9.9 seconds was respectable for the era. The automatic transmission, while convenient, resulted in a slightly slower 0-60 mph time, typically around 10.4 seconds. The gear ratios were tuned for fuel efficiency, meaning the engine sometimes felt strained during aggressive acceleration. However, the chassis, typical of BMW, provided responsive handling and a comfortable ride. The rear-wheel-drive configuration contributed to a balanced feel, although traction could be limited in wet or slippery conditions.
Equipment & Trim Levels
The 318i Touring typically came standard with features like air conditioning, power windows, power mirrors, and a basic audio system. Interior upholstery was usually cloth, although leather was available as an option. Standard dashboard trim was typically wood or aluminum. Common optional extras included a sunroof, upgraded audio system, navigation system, and sport seats. The trim level could vary depending on the market, but generally, the 318i was positioned as the entry-level Touring model, offering a good balance of features and affordability. Packages like the “Sport Package” added features like sport suspension, sport seats, and unique exterior styling elements.
Chassis & Braking
The E91 318i Touring utilized a McPherson strut front suspension and a multi-link rear suspension, providing a comfortable and controlled ride. The suspension was tuned to prioritize comfort over outright sportiness, but still offered good handling characteristics. Brakes were disc brakes on all four wheels, providing adequate stopping power. ABS (Anti-lock Braking System) was standard. Due to the lower weight compared to the six-cylinder models, the 318i Touring didn’t require the larger brakes found on those variants. Stabilizer bars were fitted front and rear to reduce body roll during cornering.
Market Reception & Comparison
The E91 318i Touring received generally positive reviews, particularly for its practicality, fuel efficiency, and BMW driving dynamics. Critics noted that it wasn’t as sporty as the higher-powered models, but it offered a compelling package for buyers seeking a versatile and comfortable wagon. Compared to the 325i Touring, the 318i offered significantly better fuel economy and a lower purchase price, but at the expense of performance. The 318i was also often compared to competitors like the Audi A4 Avant and Volvo V60, generally holding its own in terms of driving experience and build quality.
Legacy
The N46B20B engine, while generally reliable, is known to be susceptible to certain issues, including oil leaks and cooling system problems. Regular maintenance, including timely oil changes and coolant flushes, is crucial for long-term reliability. The 318i Touring has become a relatively affordable used car, appealing to buyers seeking a practical and well-built wagon. While not as sought-after as the higher-performance models, it remains a popular choice for those who prioritize fuel efficiency and everyday usability. Parts availability is generally good, and the car’s relatively simple mechanical design makes it relatively easy to maintain and repair.
