1997-1998 Volvo S90 2.9 24V (204 Hp)

The Volvo S90 2.9 24V, produced from 1997 to 1998, represented a significant evolution in Volvo’s flagship sedan lineup. Falling within the second generation of the S90 (introduced in 1996 and lasting until 1998), this variant occupied a middle ground in terms of performance and price within the S90 range. It served as a step up from the base 2.0L and 2.3L models, offering a more potent engine while remaining more accessible than the range-topping 3.0L six-cylinder. The S90, as a whole, aimed to blend Scandinavian practicality, safety, and a degree of luxury, competing with established German and Japanese executive sedans in the North American and European markets.

Technical Specifications

Powertrain & Engine Architecture

The heart of the S90 2.9 24V is the B6304S engine, a 2.9-liter inline-six cylinder powerplant. This engine is notable for its robust construction and smooth operation, characteristics typical of Volvo’s six-cylinder designs. The “24V” designation refers to the four valves per cylinder, contributing to improved breathing and power output. The B6304S utilizes a Bosch Motronic fuel injection system, managing fuel delivery and ignition timing for optimal performance and emissions control. The engine features a single overhead camshaft (SOHC) design, simplifying the valvetrain while maintaining acceptable performance. The engine’s relatively high compression ratio (typically around 10.0:1) contributes to its respectable power output. The S90 2.9 24V was exclusively offered with a four-speed automatic transmission, a common choice for the American market prioritizing convenience over outright performance. This transmission, while reliable, isn’t known for its particularly quick shifts or fuel efficiency compared to more modern automatic gearboxes.

Driving Characteristics

The 204 horsepower and approximately 200 lb-ft of torque produced by the 2.9-liter engine provide adequate, though not exhilarating, performance. Acceleration from 0-60 mph takes around 8.6 to 9.1 seconds, placing it firmly in the mid-range for executive sedans of the era. The automatic transmission, while smooth, does detract somewhat from the engine’s potential, resulting in a less engaging driving experience than the available manual transmissions in other S90 variants. The gear ratios are tuned for comfortable cruising rather than aggressive acceleration. In real-world driving, the S90 2.9 24V feels composed and stable, offering a comfortable ride quality. The engine delivers a broad torque curve, making it easy to drive in various conditions, but it lacks the responsiveness of the turbocharged engines found in higher-spec S90 models.

Equipment & Trim Levels

The S90 2.9 24V typically came well-equipped, reflecting its position as a premium sedan. Standard features generally included leather upholstery, power-adjustable front seats, a sunroof, and an upgraded audio system. Air conditioning was also standard. Optional extras included a rear-seat entertainment system, upgraded wheels, and a premium sound system. Interior trim options were relatively limited, typically offering a choice of wood or metallic finishes. The dashboard layout is classic Volvo, prioritizing functionality and ease of use. Safety features, a Volvo hallmark, were comprehensive, including anti-lock brakes (ABS) and side-impact protection systems (SIPS).

Chassis & Braking

The S90 2.9 24V utilizes a MacPherson strut front suspension and a multi-link rear suspension, providing a comfortable and controlled ride. Stabilizer bars are fitted to both the front and rear axles to reduce body roll during cornering. Braking duties are handled by ventilated disc brakes at the front and either disc or drum brakes at the rear, depending on the specific market and optional equipment. The braking system is assisted by ABS, enhancing safety and control during emergency stops. The chassis is designed for stability and comfort, rather than sporty handling, reflecting the S90’s intended role as a grand touring sedan.

Market Reception & Comparison

Critics generally praised the S90 2.9 24V for its comfortable ride, spacious interior, and strong safety credentials. However, some reviewers noted that the performance was not as exciting as some of its competitors, particularly those from Germany. Fuel economy was also a point of criticism, with the 2.9-liter engine consuming a significant amount of gasoline. Compared to the S90 3.0, the 2.9 offered a more affordable entry point into the S90 range, sacrificing some performance and refinement. Compared to the turbocharged models, the 2.9 provided a smoother, more linear power delivery, but lacked the outright acceleration of its boosted siblings. Reliability was generally good, although maintenance costs could be relatively high due to the complexity of the engine and the availability of parts.

Legacy

The Volvo S90 2.9 24V, while not the most sought-after variant, remains a respected classic among Volvo enthusiasts. The B6304S engine is known for its durability and longevity, and well-maintained examples can still provide reliable transportation today. Parts availability is generally good, although some components may be becoming increasingly difficult to find. In the used car market, the S90 2.9 24V represents a relatively affordable way to experience classic Volvo luxury and safety. Its blend of comfort, practicality, and understated elegance continues to appeal to a dedicated following, ensuring its place in automotive history.