Vauxhall Signum (facelift ) 1.9 CDTI (100 Hp)

The Vauxhall Signum, particularly the facelifted version introduced in 2005, represents an intriguing chapter in the British marque’s history. Positioned as a hatchback – often described as a ‘fastback’ due to its sloping roofline – the Signum aimed to blend the practicality of a family car with a more sporting aesthetic. While never a high-volume seller, especially outside of the United Kingdom and Europe, the Signum offered a unique alternative in the mid-size segment. The 2005 facelift brought revised styling and powertrain options, including the 1.9 CDTI diesel engine detailed here, offering a balance of fuel efficiency and reasonable performance.

Vauxhall Signum (Facelift 2005) 1.9 CDTI: An Overview

The Signum, launched in 2003, was based on the Opel Vectra C platform (Vauxhall and Opel being sister brands under General Motors). It distinguished itself from the Vectra with its more coupe-like profile and a focus on driver comfort and a slightly more premium feel. The 2005 facelift refined the exterior styling, particularly the front fascia, and updated the interior with improved materials and technology. The 1.9 CDTI variant, producing 100 horsepower, was a popular choice for buyers prioritizing fuel economy and lower running costs. It served as a competitor to other mid-size hatchbacks and saloons, though its unique styling and positioning meant it often appealed to a niche market.

Engine & Performance

The heart of the Signum 1.9 CDTI is a 1.9-liter inline-four cylinder diesel engine, designated Z19DTL. This engine utilizes a turbocharger with an intercooler to boost power output to 100 horsepower at 3500 rpm and 260 Nm (191.77 lb.-ft.) of torque at 1700 rpm. The common rail direct injection system ensures efficient fuel delivery and contributes to the engine’s relatively low emissions. The engine’s power-to-weight ratio is 16.1 kg/Hp, and its torque-to-weight ratio is 6.2 kg/Nm. This configuration provides adequate performance for everyday driving, with a maximum speed of 180 km/h (111.85 mph). The engine is transversely mounted at the front of the vehicle and is coupled with a six-speed manual transmission, driving the front wheels. Fuel economy is a strong point, with combined cycle consumption rated at 6.0 l/100 km (39.2 US mpg, 47.1 UK mpg, 16.7 km/l). The engine also incorporates a diesel particulate filter to reduce harmful emissions.

Design & Features

The Vauxhall Signum, in its facelifted 2005 form, is a five-door hatchback characterized by its distinctive sloping rear roofline. This design element gives it a more dynamic and sporty appearance compared to traditional hatchbacks. The interior offers seating for five passengers, although rear headroom can be somewhat limited due to the sloping roof. Key features of the 2005 Signum included ABS (Anti-lock Braking System), hydraulic power steering, and ventilated front disc brakes with rear discs. The interior was designed with comfort in mind, offering a reasonably well-equipped cabin for its time. The Signum’s focus was on providing a comfortable and refined driving experience, with a relatively quiet cabin and a compliant suspension setup. The McPherson strut front suspension and torsion beam rear suspension contribute to a balanced ride. The vehicle’s dimensions are 4651 mm (183.11 in) in length, 1798 mm (70.79 in) in width, and 1466 mm (57.72 in) in height.

Technical Specifications