The Volvo S80 2.9 24V Automatic, produced between 1998 and 2001, represented a significant step forward for Volvo in the mid-size luxury sedan segment. Positioned as a comfortable and refined offering, this variant utilized Volvo’s well-regarded 2.9-liter inline-six engine paired with a five-speed automatic transmission. It served as a popular choice for buyers seeking a balance between performance, fuel efficiency, and the renowned Volvo safety features. This model falls within the first generation (1998-2006) of the S80, a vehicle designed to replace the aging 700 and 900 series, and aimed to compete with established German rivals like the BMW 5 Series and Mercedes-Benz E-Class.
Technical Specifications
| Brand | Volvo |
| Model | S80 |
| Generation | S80 (First Generation) |
| Type (Engine) | 2.9 24V (204 Hp) Automatic |
| Start of production | 1998 |
| End of production | 2001 |
| Powertrain Architecture | Internal Combustion Engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (combined) | 10.1 l/100 km (23.3 US mpg / 28 UK mpg / 9.9 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.9 sec |
| Acceleration 0 – 62 mph | 8.9 sec |
| Acceleration 0 – 60 mph | 8.5 sec |
| Maximum speed | 225 km/h (139.81 mph) |
| Weight-to-power ratio | 7.6 kg/Hp, 131.6 Hp/tonne |
| Weight-to-torque ratio | 5.5 kg/Nm, 180.6 Nm/tonne |
| Power | 204 Hp @ 6000 rpm |
| Power per litre | 69.8 Hp/l |
| Torque | 280 Nm @ 4200 rpm (206.52 lb.-ft. @ 4200 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | B6304S |
| Engine displacement | 2922 cm3 (178.31 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 83 mm (3.27 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 |
| Valvetrain | DOHC |
| Engine oil capacity | 6 l (6.34 US qt | 5.28 UK qt) |
| Kerb Weight | 1550 kg (3417.17 lbs.) |
| Max. weight | 2060 kg (4541.52 lbs.) |
| Max load | 510 kg (1124.36 lbs.) |
| Trunk (boot) space – minimum | 440 l (15.54 cu. ft.) |
| Trunk (boot) space – maximum | 1106 l (39.06 cu. ft.) |
| Fuel tank capacity | 80 l (21.13 US gal | 17.6 UK gal) |
| Length | 4822 mm (189.84 in.) |
| Width | 1832 mm (72.13 in.) |
| Height | 1434 mm (56.46 in.) |
| Wheelbase | 2791 mm (109.88 in.) |
| Front track | 1562 mm (61.5 in.) |
| Rear (Back) track | 1560 mm (61.42 in.) |
| Drivetrain Architecture | Front Wheel Drive, Internal Combustion Engine |
| Number of gears and type of gearbox | 5 gears, automatic 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 |
| Tires size | 215/55 R16 |
| Wheel rims size | 16 |
Powertrain & Engine Architecture
The heart of the S80 2.9 was Volvo’s B6304S engine, a 2.9-liter inline-six cylinder powerplant. This engine was a descendant of Volvo’s long-running six-cylinder family, known for its smoothness and durability. The “24V” designation refers to the four valves per cylinder configuration, contributing to improved breathing and power output. Fuel delivery was handled by a multi-port fuel injection system, optimizing the air-fuel mixture for efficient combustion. The engine featured a double overhead camshaft (DOHC) valvetrain, further enhancing its performance characteristics. Paired with this engine was a five-speed automatic transmission, designed to provide smooth and comfortable shifts. This transmission wasn’t known for being particularly sporty, prioritizing refinement over aggressive gear changes.
Driving Characteristics
The S80 2.9 Automatic offered a comfortable and composed driving experience. With 204 horsepower and 280 Nm (206.52 lb-ft) of torque, acceleration was adequate for everyday driving, achieving 0-60 mph in around 8.5 seconds. However, it wasn’t a particularly quick car compared to some of its European competitors. The automatic transmission, while smooth, did contribute to a slight loss of responsiveness compared to the available manual transmission. Gear ratios were tuned for fuel efficiency and cruising comfort, rather than outright performance. The focus was on providing a relaxed and refined ride, typical of Volvo’s design philosophy at the time.
Equipment & Trim Levels
The S80 2.9 Automatic typically came well-equipped, reflecting its positioning as a luxury sedan. Standard features included power windows, power locks, a sunroof, and air conditioning. Interior upholstery was generally cloth, with leather options available as an upgrade. The dashboard layout was clean and functional, prioritizing ergonomics and ease of use. Optional extras included a premium audio system, heated front seats, and automatic climate control. Safety features were a major selling point, with standard ABS brakes and available side airbags.
Chassis & Braking
The S80 2.9 utilized a front-wheel-drive layout with independent wishbone suspension in the front and a coil spring setup in the rear. This suspension configuration provided a comfortable ride, absorbing bumps and imperfections in the road effectively. Braking duties were handled by ventilated discs in the front and solid discs in the rear. ABS (Anti-lock Braking System) was standard, enhancing braking performance and stability, particularly in adverse conditions. The steering was rack and pinion with hydraulic power assistance, offering a reasonably responsive feel.
Market Reception & Comparison
The S80 2.9 Automatic was generally well-received by automotive critics. It was praised for its comfortable ride, spacious interior, and strong safety credentials. However, some reviewers noted that its performance was not as engaging as some of its rivals, and the automatic transmission could feel somewhat sluggish. Compared to the higher-output S80 T6 (with its turbocharged engine), the 2.9 offered a more affordable entry point into the S80 range, but at the expense of performance. Fuel economy was reasonable for its class, averaging around 23.3 US mpg in combined driving. The 2.9 was often seen as a more sensible and practical choice than the more powerful, and more expensive, T6 model.
Legacy
The Volvo S80 2.9 Automatic has proven to be a relatively reliable vehicle over the long term. The inline-six engine is known for its durability, and the automatic transmission, while not particularly exciting, is generally robust. However, like any older vehicle, maintenance is key to ensuring its continued reliability. Common issues include oil leaks and wear on suspension components. Today, the S80 2.9 Automatic represents an affordable and comfortable entry into the classic Volvo market. It appeals to buyers who appreciate Volvo’s reputation for safety and durability, and who are looking for a well-equipped and refined sedan at a reasonable price.
