1984-1990 Renault 25 (B29) 2.5 V6 Turbo (B295) (181 Hp)

The Renault 25 (B29) 2.5 V6 Turbo, designated internally as the B295, was a high-performance variant of the Renault 25 executive hatchback produced between 1984 and 1990. Representing the pinnacle of the B29 series, it offered a significant power upgrade over the naturally aspirated engines available, positioning itself as a competitor to vehicles like the Peugeot 505 Turbo Injection and the Ford Sierra Cosworth. The Renault 25, launched in 1984, was intended to replace the Renault 20/30, offering a more modern and spacious package. The B295, with its turbocharged V6, was the flagship model, showcasing Renault’s engineering capabilities.

The Renault 25 B295: A Performance Flagship

The B295 variant distinguished itself from the rest of the Renault 25 lineup through its potent 2.5-liter V6 engine equipped with a turbocharger. While other Renault 25 models offered more economical engine options, the B295 was geared towards drivers seeking a blend of luxury and performance. It was positioned as the premium trim level, featuring enhanced interior appointments and a more aggressive exterior styling compared to the base models. The B295 was not a volume seller, representing a relatively small percentage of total Renault 25 production, and was aimed at a discerning clientele.

Powertrain & Engine Architecture

The heart of the Renault 25 B295 is the Z7U engine, a 2.463-liter (150.2 cubic inches) 60-degree V6. This engine is notable for its all-aluminum construction, a relatively advanced feature for the time, contributing to a lighter overall weight. The Z7U utilizes a single overhead camshaft (SOHC) design per cylinder bank, operating two valves per cylinder (intake and exhaust). The key differentiating factor, of course, is the addition of a Garrett T3 turbocharger with an intercooler. This forced induction system significantly boosted power output. Fuel delivery is managed by Bosch Motronic fuel injection, a sophisticated electronic system for its era, optimizing fuel efficiency and performance. The turbocharger provides approximately 9 psi of boost. The engine’s compression ratio is 8.5:1, a reduction from the naturally aspirated V6 to accommodate the turbocharging.

The B295 was exclusively offered with a four-speed automatic transmission. This transmission, while providing convenience, was a point of criticism for some reviewers who felt it didn’t fully exploit the engine’s potential. The automatic transmission features electronic control, offering smoother shifts compared to older hydraulic systems. The transmission’s gear ratios are geared towards providing a balance between acceleration and cruising efficiency. The final drive ratio is typically 3.69:1.

Driving Characteristics

The Renault 25 B295 delivers a distinctly different driving experience compared to the lower-powered Renault 25 variants. The turbocharger provides a noticeable surge of power, particularly in the mid-range, allowing for brisk acceleration. While not a sports car in the purest sense, the B295 offers a level of performance that was unexpected for a large, front-wheel-drive hatchback of the 1980s. The 0-60 mph time is approximately 7.5 seconds, and the top speed is around 137 mph. The automatic transmission, while convenient, can feel somewhat sluggish during quick downshifts. The car’s front-wheel-drive layout can also lead to torque steer under hard acceleration. The suspension, tuned for comfort, provides a relatively smooth ride, but body roll is noticeable during cornering. The steering is power-assisted, offering light and easy maneuverability.

Equipment & Trim Levels

The B295 came standard with a comprehensive list of features, reflecting its position as the top-of-the-line Renault 25 model. Standard equipment included leather upholstery, power windows, central locking, a sunroof, and an upgraded sound system. Air conditioning was also standard. The interior trim featured woodgrain accents and a more refined dashboard layout compared to the base models. Optional extras included a trip computer, upgraded audio systems, and metallic paint finishes. The seats were typically offered in dark shades of leather, such as black or dark blue. The exterior styling of the B295 was subtly differentiated from other Renault 25 models with unique alloy wheels and a rear spoiler.

Chassis & Braking

The Renault 25 B295 utilizes a MacPherson strut front suspension and a torsion beam rear suspension. The suspension is tuned for comfort, providing a relatively smooth ride. Stabilizer bars are fitted to both the front and rear axles to reduce body roll. The braking system consists of ventilated disc brakes on the front wheels and drum brakes on the rear wheels. The braking system is assisted by a vacuum booster. The B295’s tires are typically 195/60 R15, providing adequate grip for its performance capabilities. The steering is a power-assisted rack-and-pinion system, offering light and precise steering feel.

Market Reception & Comparison

The Renault 25 B295 received generally positive reviews from automotive critics. It was praised for its powerful engine, comfortable ride, and spacious interior. However, the automatic transmission was often criticized for its lack of responsiveness. Compared to its rivals, such as the Peugeot 505 Turbo Injection and the Ford Sierra Cosworth, the B295 offered a more luxurious and refined driving experience, but lacked the outright sporting prowess of the Sierra Cosworth. Fuel economy was reasonable for a turbocharged V6, averaging around 20-25 mpg in mixed driving. Reliability was generally good, although the turbocharger and fuel injection system required regular maintenance. The B295 was more expensive than other Renault 25 models, reflecting its higher level of equipment and performance.

Technical Specifications

Legacy

The Renault 25 B295 remains a relatively rare and sought-after classic car. Its turbocharged V6 engine and luxurious appointments make it a desirable vehicle for collectors and enthusiasts. While the automatic transmission may not appeal to purists, the B295 offers a unique and enjoyable driving experience. The Z7U engine, while requiring regular maintenance, is generally considered to be a robust and reliable unit. Parts availability can be a challenge, but a dedicated network of Renault enthusiasts and specialists exists to support owners. In the used car market today, well-maintained examples of the B295 can command a premium price, reflecting its rarity and historical significance. The Renault 25 B295 represents a high point in Renault’s engineering and design, showcasing the company’s ability to create a luxurious and high-performance executive hatchback.