1986-1988 Renault 25 (B29) 2.8 V6 Injection (B29A) (136 Hp)

The Renault 25 (B29) 2.8 V6 Injection, designated internally as the B29A and producing 136 horsepower, was a premium variant of the Renault 25 large family car produced between 1986 and 1988. Positioned as the flagship model within the B29 range, it represented the pinnacle of comfort and performance for the Renault 25 line. The B29 generation Renault 25, launched in 1984, aimed to replace the Renault 20/30 series and offer a more modern and spacious alternative in the executive car segment. The 2.8 V6 Injection was the top-of-the-line offering, distinguished by its larger engine and more luxurious appointments compared to the four-cylinder models.

Renault 25 B29 2.8 V6 Injection: An Overview

The Renault 25 B29, introduced as a successor to the Renault 20/30, was a significant step forward for Renault in terms of design and technology. The B29 chassis, a monocoque construction, provided a solid foundation for the car. The 2.8 V6 Injection model was specifically targeted at buyers seeking a refined and powerful vehicle, offering a blend of performance and comfort that the lower-spec models couldn’t match. It competed with vehicles like the Peugeot 505, Citroën CX, and Ford Granada in the European market.

Powertrain & Engine Architecture

The heart of the Renault 25 B29 2.8 V6 Injection is the Z7W engine, a 2,792 cc (170.3 cu in) naturally aspirated V6. This engine is a 90-degree V6, known for its relatively smooth operation and decent power output. The “Injection” designation refers to the Bosch L-Jetronic fuel injection system employed, a significant upgrade over carbureted engines of the time. This system allowed for more precise fuel delivery, improving both performance and fuel efficiency. The engine features a single overhead camshaft (SOHC) design per cylinder bank, operating two valves per cylinder (intake and exhaust). The compression ratio was 9.5:1. The engine produced 136 hp (101 kW) at 5,500 rpm and 196 lb-ft (266 Nm) of torque at 3,500 rpm. The engine block is constructed from cast iron, while the cylinder heads are made of aluminum alloy. The Z7W engine was known for its durability, but also for its potential for oil leaks as it aged.

The Renault 25 B29 2.8 V6 Injection was typically paired with a three-speed automatic transmission. This transmission, while providing convenience, was not known for its particularly quick shifts or fuel efficiency. It was a traditional hydraulic automatic, lacking the electronic controls found in more modern transmissions. The gear ratios were optimized for comfortable cruising rather than sporty acceleration. A five-speed manual transmission was available as an option in some markets, offering a more engaging driving experience and slightly improved fuel economy.

Driving Characteristics

The Renault 25 B29 2.8 V6 Injection offered a comfortable and refined driving experience. The V6 engine provided ample power for effortless cruising on highways and confident overtaking maneuvers. However, the car’s relatively heavy weight (approximately 3,350 lbs) and the three-speed automatic transmission meant that acceleration was not particularly brisk. Zero to sixty mph times were typically in the 9-10 second range. The automatic transmission’s gear ratios were spaced to prioritize smooth operation and fuel economy over outright performance. The steering was power-assisted, providing light and easy maneuverability, but lacked significant feedback. The suspension, designed for comfort, absorbed bumps and imperfections in the road well, but could result in some body roll during cornering.

Equipment & Trim Levels

The 2.8 V6 Injection model was the most well-equipped variant of the Renault 25 B29. Standard features typically included central locking, electric windows, power steering, and a high-quality stereo system. The interior was trimmed with comfortable cloth or velour upholstery, and featured woodgrain accents on the dashboard and door panels. Leather upholstery was often available as an optional extra. Air conditioning was also a common option. The dashboard layout was functional and straightforward, with clearly labeled controls. Higher-spec versions could include features like a trip computer and a sunroof. The Renault 25 B29 2.8 V6 Injection aimed to provide a luxurious and comfortable environment for both driver and passengers.

Chassis & Braking

The Renault 25 B29 utilized a MacPherson strut front suspension and a torsion beam rear suspension. This setup provided a good balance between comfort and handling. The front suspension featured coil springs and anti-roll bar, while the rear suspension relied on torsion bars. The braking system consisted of disc brakes on all four wheels, providing adequate stopping power. Power assistance was standard. The car’s weight distribution was relatively balanced, contributing to its stable handling characteristics. The tires were typically 185/65 R14, providing a good compromise between comfort and grip.

Market Reception & Comparison

The Renault 25 B29 2.8 V6 Injection was generally well-received by automotive critics. It was praised for its comfortable ride, spacious interior, and refined engine. However, the automatic transmission was often criticized for its sluggishness and lack of responsiveness. Compared to its rivals, the Renault 25 offered a good value proposition, providing a similar level of luxury and performance at a lower price point. The four-cylinder Renault 25 models were more popular due to their lower price and better fuel economy. The V6 model appealed to a smaller segment of buyers who prioritized performance and refinement. Fuel economy for the 2.8 V6 Injection was typically around 18-22 mpg in mixed driving conditions, significantly lower than the four-cylinder models.

Technical Specifications

Legacy

The Renault 25 B29 2.8 V6 Injection, while not a high-volume seller, remains a desirable classic car today. The Z7W V6 engine is generally considered to be a reliable unit, although regular maintenance is essential to prevent oil leaks and ensure optimal performance. Parts availability can be a challenge, but a dedicated community of Renault enthusiasts helps to keep these cars on the road. The car’s comfortable ride, spacious interior, and distinctive styling continue to appeal to collectors and enthusiasts. The automatic transmission, however, remains a potential weak point, and finding a well-maintained example with a manual gearbox is often preferred. In the used car market, well-preserved examples of the 2.8 V6 Injection command a premium price, reflecting their rarity and desirability.