The Saturn Astra, specifically the 1.8L 5-Door XR model produced between 2007 and 2010, represented Saturn’s entry into the compact hatchback segment in the United States. Based on the Opel Astra J (though visually distinct from later Astra generations sold in North America), it aimed to provide a European-flavored driving experience with a focus on practicality and fuel efficiency. The Astra was positioned as a competitor to vehicles like the Honda Civic, Toyota Corolla, and Mazda3, offering a different aesthetic and driving dynamic than many of its Japanese rivals. This generation of Astra was a relatively short-lived offering for Saturn, coinciding with the brand’s eventual discontinuation following General Motors’ restructuring in 2010.
Saturn Astra 1.8L XR: An Overview
The Astra 1.8L XR was a key variant within the Astra lineup, offering a balance between performance and economy. It was available exclusively as a five-door hatchback, emphasizing its practicality for everyday use. The “XR” designation indicated a trim level that included a reasonable level of standard features, making it a popular choice for buyers seeking a well-equipped compact car. While Saturn as a brand was known for its no-haggle pricing and customer-focused sales approach, the Astra itself was praised for its handling and interior design, though criticisms were often leveled at its engine’s refinement and overall build quality compared to established competitors.
Engine & Performance
The heart of the Saturn Astra 1.8L XR is a 1.8-liter inline four-cylinder engine, designated the Z18XER. This naturally aspirated engine produces 138 horsepower at 6,300 rpm and 170 Nm (125.39 lb.-ft.) of torque at 3,800 rpm. The engine features multi-port fuel injection and a double overhead camshaft (DOHC) valvetrain with four valves per cylinder. This configuration contributes to a power output of 76.8 horsepower per liter. Power is delivered to the front wheels via a five-speed manual transmission. The weight-to-power ratio is 9.1 kg/Hp, or 110.5 Hp/tonne, and the weight-to-torque ratio is 7.3 kg/Nm, or 136.1 Nm/tonne. Fuel economy is rated at 9.8 l/100 km (24 US mpg) in urban driving and 7.4 l/100 km (31.8 US mpg) in extra-urban conditions. The engine’s performance is adequate for daily commuting and general driving, but it isn’t particularly sporty or quick.
Design & Features
The Saturn Astra 1.8L XR is a five-door hatchback, offering a versatile body style that combines passenger space with cargo capacity. The exterior design, while sharing some similarities with the European Opel Astra, features unique styling cues specific to the North American market. Inside, the Astra offers seating for five passengers. The interior design was considered relatively modern for its time, with a focus on ergonomics and user-friendliness. Standard safety features included ABS (Anti-lock Braking System). The Astra’s trunk offers 345 liters (12.18 cu. ft.) of space with the rear seats up, expanding to 1266 liters (44.71 cu. ft.) when the rear seats are folded down. The vehicle’s dimensions are 4331 mm (170.51 in.) in length, 1753 mm (69.02 in.) in width, and 1458 mm (57.4 in.) in height, with a wheelbase of 2614 mm (102.91 in.).
Suspension and Handling
The Astra utilizes an independent McPherson strut suspension in the front, paired with a torsion beam suspension in the rear. This setup provides a comfortable ride while maintaining reasonably good handling characteristics. Steering is rack and pinion with electric power steering assistance. The front brakes are ventilated discs, while the rear brakes are solid discs. This combination provides adequate stopping power for everyday driving conditions. The Astra’s front and rear track widths are both 1488 mm (58.58 in.), contributing to its stable handling.
Technical Specifications
| Brand | Saturn |
| Model | Astra |
| Type (Engine) | 1.8L (138 Hp) 5-Door XR |
| Start of production | 2007 |
| End of production | 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 9.8 l/100 km (24 US mpg) |
| Fuel consumption (extra urban) | 7.4 l/100 km (31.8 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 9.1 kg/Hp |
| Weight-to-torque ratio | 7.3 kg/Nm |
| Power | 138 Hp @ 6300 rpm |
| Torque | 170 Nm @ 3800 rpm (125.39 lb.-ft. @ 3800 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | Z18XER |
| Engine displacement | 1796 cm3 (109.6 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 80.5 mm (3.17 in.) |
| Piston Stroke | 88.2 mm (3.47 in.) |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated |
| Valvetrain | DOHC |
| Engine oil capacity | 4.5 l (4.76 US qt | 3.96 UK qt) |
| Coolant capacity | 6.9 l (7.29 US qt | 6.07 UK qt) |
| Kerb Weight | 1249 kg (2753.57 lbs.) |
| Trunk (boot) space – minimum | 345 l (12.18 cu. ft.) |
| Trunk (boot) space – maximum | 1266 l (44.71 cu. ft.) |
| Fuel tank capacity | 45 l (11.89 US gal | 9.9 UK gal) |
| Length | 4331 mm (170.51 in.) |
| Width | 1753 mm (69.02 in.) |
| Height | 1458 mm (57.4 in.) |
| Wheelbase | 2614 mm (102.91 in.) |
| Front track | 1488 mm (58.58 in.) |
| Rear track | 1488 mm (58.58 in.) |
| Drivetrain | Front wheel drive |
| Number of gears | 5 |
| Gearbox type | Manual transmission |
| Front suspension | Independent, McPherson with coil spring and anti-roll bar |
| Rear suspension | Torsion |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Steering type | Steering rack and pinion |
| Power steering | Electric |
The Saturn Astra 1.8L XR, while not a groundbreaking vehicle, offered a compelling package for buyers seeking a practical and reasonably efficient compact hatchback. Its European roots provided a different driving experience compared to many of its American and Japanese competitors, and its relatively short production run has given it a degree of collectibility among Saturn enthusiasts.
