The Mazda 626 IV, produced between 1993 and 1997, represented a significant evolution in Mazda’s mid-size offerings. The GE generation, specifically the 2.0 D GLX Comprex variant with its 75 horsepower diesel engine, was primarily aimed at the European market where fuel efficiency and practicality were highly valued. This model occupied a position as an entry-level diesel option within the 626 range, offering a more economical alternative to the gasoline-powered versions. It was positioned below the more powerful 2.0i models and served as a competitor to vehicles like the Ford Mondeo and Opel Vectra in the diesel segment.
Technical Specifications
| Brand | Mazda |
| Model | 626 |
| Generation | 626 IV Hatchback (GE) |
| Type | 2.0 D GLX Comprex (75 Hp) |
| Start of production | 1993 |
| End of production | 1997 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (combined) | 6.8 l/100 km (34.6 US mpg, 41.5 UK mpg, 14.7 km/l) |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 14.7 sec |
| Acceleration 0 – 62 mph | 14.7 sec |
| Acceleration 0 – 60 mph | 14 sec |
| Maximum speed | 161 km/h (100.04 mph) |
| Weight-to-power ratio | 17.3 kg/Hp, 57.9 Hp/tonne |
| Weight-to-torque ratio | 7.7 kg/Nm, 130.5 Nm/tonne |
| Power | 75 Hp @ 4000 rpm |
| Power per litre | 37.5 Hp/l |
| Torque | 169 Nm @ 2000 rpm (124.65 lb.-ft. @ 2000 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | RF55 |
| Engine displacement | 1998 cm3 (121.93 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 86 mm (3.39 in.) |
| Piston Stroke | 86 mm (3.39 in.) |
| Compression ratio | 21.1:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Precombustion chamber injection |
| Engine aspiration | Supercharger |
| Valvetrain | OHC |
| Engine oil capacity | 5.5 l (5.81 US qt | 4.84 UK qt) |
| Coolant capacity | 5.5 l (5.81 US qt | 4.84 UK qt) |
| Kerb Weight | 1295 kg (2854.99 lbs.) |
| Max. weight | 1715 kg (3780.93 lbs.) |
| Max load | 420 kg (925.94 lbs.) |
| Trunk (boot) space – minimum | 455 l (16.07 cu. ft.) |
| Trunk (boot) space – maximum | 747 l (26.38 cu. ft.) |
| Fuel tank capacity | 60 l (15.85 US gal | 13.2 UK gal) |
| Length | 4700 mm (185.04 in.) |
| Width | 1750 mm (68.9 in.) |
| Height | 1390 mm (54.72 in.) |
| Wheelbase | 2610 mm (102.76 in.) |
| Front track | 1500 mm (59.06 in.) |
| Rear track | 1500 mm (59.06 in.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears | 5 gears, manual transmission |
| Front suspension | Wishbone |
| Rear suspension | Trailing arm |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 195/60 R15 88 H |
| Wheel rims size | 5.5J x 14 ET 45 |
Powertrain & Engine Architecture
The heart of the 626 2.0 D GLX Comprex is the RF55 engine, a 1.998-liter inline-four diesel. This engine utilized a precombustion chamber injection system, a common technology for diesel engines of the era. This system involved injecting fuel into a small pre-chamber within the cylinder head, where it partially combusted before igniting the main charge in the cylinder. This design aided in smoother combustion and reduced engine noise compared to direct injection systems. The engine featured an overhead camshaft (OHC) valvetrain with two valves per cylinder. The 75 horsepower output at 4000 rpm and 169 Nm (124.65 lb-ft) of torque at 2000 rpm were typical figures for a naturally aspirated diesel engine of this displacement in the early 1990s. The engine was paired with a five-speed manual transmission, chosen for its efficiency and cost-effectiveness. While an automatic transmission was available on other 626 models, it wasn’t offered with this specific diesel engine.
Driving Characteristics
The 626 2.0 D GLX Comprex prioritized fuel economy over outright performance. Acceleration was modest, with a 0-60 mph time of around 14 seconds and a top speed of 100 mph. The engine’s torque delivery was relatively flat, providing adequate pulling power for everyday driving and highway cruising. However, it lacked the responsiveness of the gasoline engines. The five-speed manual transmission allowed drivers to keep the engine in its optimal power band, but frequent downshifts were often necessary for overtaking or climbing hills. Compared to the more powerful 2.0i gasoline variants, the diesel offered significantly less horsepower but a substantial improvement in fuel economy. The manual transmission, while efficient, didn’t offer the convenience of an automatic, making it less appealing to some drivers.
Equipment & Trim Levels
The GLX Comprex trim level represented a mid-range offering within the 626 lineup. Standard features typically included power steering, central locking, electric front windows, and an AM/FM radio. The interior was generally functional and durable, with cloth upholstery and a straightforward dashboard layout. Optional extras could include air conditioning, a sunroof, and upgraded audio systems. The “Comprex” designation often indicated a specific package of features, which could vary slightly depending on the market. The focus was on providing a well-equipped, practical vehicle at a reasonable price point.
Chassis & Braking
The 626 IV utilized a front-engine, front-wheel-drive layout. The front suspension employed a wishbone design, while the rear suspension featured a trailing arm setup. This configuration provided a reasonable balance between ride comfort and handling. The braking system consisted of ventilated discs on the front wheels and solid discs on the rear, offering adequate stopping power for the vehicle’s weight and performance. An Anti-lock Braking System (ABS) was included as standard, enhancing safety and control during emergency braking situations. The steering was rack and pinion, providing precise and responsive handling.
Market Reception & Comparison
The Mazda 626 2.0 D GLX Comprex was generally well-received in the European market as a practical and economical family car. Critics praised its fuel efficiency and durability, but noted its lack of outright performance. Compared to the gasoline-powered 626 models, the diesel offered significantly better fuel economy but at the expense of acceleration and refinement. Against competitors like the Ford Mondeo and Opel Vectra diesel, the 626 offered a competitive package in terms of price, features, and fuel efficiency. However, some rivals offered more powerful diesel engines or a wider range of trim levels.
Legacy
The RF55 diesel engine, while not known for being particularly high-tech, proved to be relatively reliable and durable. Many examples of the 626 2.0 D GLX Comprex are still on the road today, testament to its robust construction. In the used car market, these models are often sought after by buyers looking for an affordable and economical vehicle. Maintenance costs are generally reasonable, although finding specific parts can sometimes be challenging due to the vehicle’s age. The 626 IV, and particularly the diesel variants, represent a significant chapter in Mazda’s history, demonstrating the company’s commitment to providing practical and fuel-efficient vehicles for the European market.
