The Opel Calibra, particularly the 2.5 V6 ECOTEC variant introduced with the 1994 facelift, represented a high-performance offering within Opel’s coupe lineup. Produced from 1994 to 1996, this model aimed to combine sporty aesthetics with a potent engine, appealing to drivers seeking a stylish and capable grand tourer. The Calibra itself was based on the GM410 platform, shared with the Vauxhall/Opel Astra and Vectra, but distinguished itself through its fastback coupe design and focus on driving dynamics. The 2.5 V6 ECOTEC was positioned as the flagship engine option, offering a significant performance upgrade over the four-cylinder models.
Technical Specifications
| Brand | Opel |
| Model | Calibra |
| Generation | Calibra (facelift 1994) |
| Type (Engine) | 2.5 V6 ECOTEC (170 Hp) |
| Start of production | 1994 |
| End of production | 1996 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 3 |
| Fuel consumption (urban) | 11.4 l/100 km (20.6 US mpg) |
| Fuel consumption (extra urban) | 6.6 l/100 km (35.6 US mpg) |
| Fuel consumption (combined) | 8.7 l/100 km (27 US mpg) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 7.8 sec |
| Acceleration 0 – 62 mph | 7.8 sec |
| Acceleration 0 – 60 mph | 7.4 sec |
| Maximum speed | 237 km/h (147.26 mph) |
| Weight-to-power ratio | 8 kg/Hp |
| Weight-to-torque ratio | 6 kg/Nm |
| Power | 170 Hp @ 6000 rpm |
| Power per litre | 68.1 Hp/l |
| Torque | 227 Nm @ 4200 rpm (167.43 lb.-ft. @ 4200 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | C25XE |
| Engine displacement | 2498 cm3 (152.44 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 81.6 mm (3.21 in.) |
| Piston Stroke | 79.6 mm (3.13 in.) |
| Compression ratio | 10.8:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 4.5 l (4.76 US qt | 3.96 UK qt) |
| Coolant | 7.5 l (7.93 US qt | 6.6 UK qt) |
| Kerb Weight | 1355 kg (2987.26 lbs.) |
| Max. weight | 1775 kg (3913.21 lbs.) |
| Max load | 420 kg (925.94 lbs.) |
| Trunk (boot) space – minimum | 300 l (10.59 cu. ft.) |
| Trunk (boot) space – maximum | 980 l (34.61 cu. ft.) |
| Fuel tank capacity | 63 l (16.64 US gal | 13.86 UK gal) |
| Length | 4492 mm (176.85 in.) |
| Width | 1688 mm (66.46 in.) |
| Height | 1320 mm (51.97 in.) |
| Wheelbase | 2600 mm (102.36 in.) |
| Front track | 1426 mm (56.14 in.) |
| Rear (Back) track | 1446 mm (56.93 in.) |
| Drag coefficient (Cd) | 0.26 |
| Minimum turning circle | 11.45 m (37.57 ft.) |
| Drivetrain Architecture | ICE, Front wheel drive |
| Drive wheel | Front wheel drive |
| Number of gears | 5 |
| Gearbox type | Manual transmission |
| Front suspension | Independent type McPherson, Transverse stabilizer |
| Rear suspension | Transverse stabilizer, 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 | 205/55 R15 |
| Wheel rims size | 6J x 15 |
INTRODUCTION
The 1994 facelift of the Opel Calibra brought with it a revised front end, updated interior trim, and crucially, the availability of the 2.5-liter V6 ECOTEC engine. This engine, designated C25XE, was a significant upgrade from the previously offered 2.0-liter four-cylinder options. The Calibra, designed to be a more affordable and accessible alternative to cars like the Porsche 944 and BMW Z1, aimed to deliver a sporty driving experience with a focus on style. The 2.5 V6 model was positioned as the performance leader within the Calibra range, offering a compelling blend of power, handling, and practicality.
Powertrain & Engine Architecture
The heart of the Calibra 2.5 V6 is the C25XE engine, a 60-degree V6 displacing 2.5 liters (2498 cc). This engine is a naturally aspirated, all-aluminum alloy design featuring a dual overhead camshaft (DOHC) valvetrain with four valves per cylinder. It utilizes a multi-port fuel injection system, delivering precise fuel metering for optimal performance and efficiency. The ECOTEC designation signifies Opel’s commitment to fuel efficiency and reduced emissions. The engine produces 170 horsepower at 6000 rpm and 227 Nm (167.43 lb-ft) of torque at 4200 rpm. The engine’s robust construction and relatively simple design contribute to its reliability. The Calibra 2.5 V6 was exclusively offered with a five-speed manual transmission, providing drivers with full control over the engine’s power delivery.
Driving Characteristics
The Calibra 2.5 V6 offered a noticeably more engaging driving experience than its four-cylinder counterparts. The V6 engine provided smooth and linear power delivery throughout the rev range, making it well-suited for both spirited driving and comfortable cruising. The five-speed manual transmission allowed drivers to exploit the engine’s power effectively, with well-spaced gear ratios. Acceleration from 0 to 60 mph was achieved in approximately 7.4 seconds, and the car could reach a top speed of 147.26 mph. While not a dedicated sports car, the Calibra 2.5 V6 offered a balanced and enjoyable driving experience, with good handling characteristics and a relatively comfortable ride.
Equipment & Trim Levels
The Calibra 2.5 V6 typically came with a higher level of standard equipment compared to the lower-spec models. This included features such as power windows, central locking, power steering, and an upgraded audio system. Interior upholstery was typically cloth, although leather options were available. The dashboard featured a sporty design with clear instrumentation. Optional extras included a sunroof, alloy wheels, and upgraded sound systems. The overall interior ambiance was focused on providing a comfortable and functional environment for both driver and passengers.
Chassis & Braking
The Calibra 2.5 V6 utilized an independent McPherson strut suspension at the front and a trailing arm suspension at the rear, both incorporating a transverse stabilizer bar. This suspension setup provided a good balance between ride comfort and handling performance. The braking system consisted of ventilated discs at the front and solid discs at the rear, with ABS (Anti-lock Braking System) as standard equipment. The Calibra’s chassis was designed to provide a stable and predictable handling experience, with relatively low body roll during cornering.
Market Reception & Comparison
The Calibra 2.5 V6 was generally well-received by automotive critics, who praised its stylish design, strong performance, and relatively affordable price. It was often compared to other coupes in its class, such as the Ford Probe and Mazda MX-6. While the Calibra 2.5 V6 offered more power than many of its competitors, it also tended to consume more fuel. Reliability was generally good, although some owners reported issues with the cooling system and electrical components. The Calibra 2.5 V6 appealed to drivers who wanted a sporty and stylish coupe without the high price tag of a premium brand.
Legacy
The Opel Calibra 2.5 V6 has become a popular classic car among enthusiasts. The C25XE engine is known for its durability and relatively simple maintenance requirements. While parts availability can be a challenge, the engine is generally considered to be reliable if properly maintained. Today, the Calibra 2.5 V6 is sought after by collectors and drivers who appreciate its unique styling and engaging driving experience. It represents a significant chapter in Opel’s history, showcasing the brand’s ability to produce stylish and capable coupes.
