Bentley Corniche

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Bentley Corniche: A Comprehensive Guide

The Bentley Corniche represents the pinnacle of British automotive luxury. A grand tourer in the truest sense, it blended effortless performance with unparalleled comfort and craftsmanship. Named after the scenic roads along the French Riviera, the Corniche was produced by Bentley from 1971 to 1995. Sharing a platform with the Rolls-Royce Corniche (and mechanically similar, they were differentiated by styling and badging), the Bentley version often appealed to those seeking a slightly sportier, though still supremely refined, driving experience.

Generations of the Bentley Corniche

While often considered a single model, the Corniche underwent subtle but significant changes throughout its production run. Here's a breakdown of the major iterations:

• Corniche I (1971-1984): The original. Key features included the 6.75-liter V8 engine, automatic transmission, self-leveling suspension, and signature styling cues like the vertically oriented grille and graceful body lines. Early models (pre-1977) had a characteristic "split-level" air conditioning system. Notable updates during this period included changes to the rear suspension and improvements to the emissions control systems. The distinctive chrome bumpers and brightwork remained hallmarks of this generation.
• Corniche II (1984-1988): Subtle but important upgrades characterized the Corniche II. These included a revised rear suspension with independent semi-trailing arms, improved ride quality, and enhanced interior comfort. Exterior changes were minimal, often limited to detail changes in trim and badging. The engine remained largely unchanged but benefited from incremental improvements. This generation also saw improved rust proofing measures.
• Corniche III (1988-1992): A significant evolution. The Corniche III featured Bosch Motronic fuel injection, replacing the Solex carburetors of earlier models. This resulted in improved fuel economy, smoother running, and increased power. Cosmetically, the bumpers were redesigned, becoming more integrated with the bodywork. The interior received further refinements, with enhanced seating and trim options. This is often considered the most desirable of the pre-Turbo models due to the fuel injection.
• Corniche IV (1993-1995): The final iteration. The Corniche IV was a limited production run, with only a small number produced. Key changes included a driver's side airbag, revised instrumentation, and even more opulent interior appointments. These are the rarest and often the most expensive Corniche models. They represent the ultimate expression of the classic Corniche design.

Reliability and Common Issues

Owning a Bentley Corniche is a rewarding experience, but potential buyers should be aware of the common issues that can arise with these complex vehicles. Proper maintenance and a thorough pre-purchase inspection are crucial.

• Hydraulics: The hydraulic system, responsible for braking, suspension leveling, and power steering, is a notorious source of problems. Leaks are common, and rebuilding or replacing components can be expensive. Regular fluid changes with the correct Rolls-Royce/Bentley specified fluid (often a mineral oil-based fluid) are vital. Accumulator spheres are a common failure point.
• Engine: The 6.75-liter V8 is generally robust, but issues can arise with the carburetors (on pre-Corniche III models) requiring careful tuning and maintenance. Oil leaks are common as these engines age. The fuel injection system on the Corniche III & IV is generally more reliable, but sensors and wiring can still fail. Check for signs of overheating, unusual noises, and excessive oil consumption.
• Transmission: The General Motors TH400 automatic transmission is generally reliable, but rebuilds are inevitable with age and mileage. Ensure smooth shifting and check for leaks.
• Rust: While rust proofing was improved over time, rust can still be a problem, especially in areas with harsh climates. Pay close attention to the lower body panels, sills, wheel arches, and the underside of the car.
• Electrics: The Corniche has a complex electrical system, and wiring can become brittle and corroded over time. Ensure all electrical components, including lights, windows, and gauges, are functioning properly. Faulty switches and relays are common culprits.
• Air Conditioning: Early models with the split-level air conditioning system can be particularly troublesome to maintain. Converting to a more modern refrigerant may improve performance but requires careful adaptation of the system. Later models with more conventional systems are generally more reliable but can still suffer from leaks and component failures.
• Interior: The luxurious leather and wood trim can show signs of wear and tear over time. Check for cracked leather, faded carpets, and delaminated wood veneer. Restoring the interior can be expensive.
• Brakes: Due to the hydraulic system, brake problems can be costly. Check for correct operation of the system and any leaks.

Driving Experience

The Bentley Corniche is not a sports car, but rather a supremely comfortable and luxurious grand tourer. It's designed for effortless cruising and long-distance travel.

Pros:

• Unmatched Comfort: The plush leather seats, smooth ride, and quiet cabin create an exceptionally comfortable driving environment.
• Effortless Performance: The 6.75-liter V8 provides ample power for relaxed cruising and effortless acceleration.
• Timeless Elegance: The Corniche's classic design exudes timeless elegance and prestige.
• Road Presence: It commands attention wherever it goes.

Cons:

• Maintenance Costs: The Corniche is an expensive car to maintain. Parts and labor can be costly.
• Fuel Economy: Fuel economy is poor, even by the standards of its era.
• Handling: The Corniche is not designed for sporty handling. Its focus is on comfort and refinement.
• Size and Weight: Its large size and heavy weight can make it challenging to maneuver in tight spaces.

Buying Advice

Buying a Bentley Corniche requires careful consideration and research. Here's some advice for potential buyers:

• Pre-Purchase Inspection: Absolutely essential. Have a qualified mechanic with experience working on Rolls-Royce and Bentley vehicles perform a thorough inspection. Pay particular attention to the hydraulic system, engine, transmission, and rust.
• Service History: Look for a well-documented service history. Regular maintenance is crucial for the Corniche's reliability.
• Model Year: Corniche III and IV models (1988-1995) are generally considered more desirable due to the Bosch Motronic fuel injection, which improves reliability and performance. Corniche IV models, while rare, boast further refinements.
• Budget: Factor in the cost of maintenance and repairs when budgeting for a Corniche. These cars can be expensive to own.
• Avoid Project Cars: Unless you're a highly skilled mechanic with deep pockets, avoid cars that require significant restoration. The cost of restoring a Corniche can quickly exceed its market value.
• Originality: Originality is valued by collectors. Avoid cars that have been heavily modified or have non-original parts.
• Rust Inspection: Check for rust in all the common areas – sills, wheel arches, floor pans.

Ultimately, buying a Bentley Corniche is about fulfilling a dream. With careful research, a thorough inspection, and a realistic understanding of the maintenance costs, you can enjoy the unparalleled luxury and timeless elegance of this iconic grand tourer.

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