Vauxhall Signum (facelift ) 1.8 (140 Hp) Easytronic

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 ‘sports hatch’ – it aimed to bridge the gap between traditional family saloons and the growing popularity of more dynamic, versatile vehicles. While not widely sold in the United States, the Signum was a significant model for Vauxhall (and its Opel counterpart in mainland Europe) during its production run from 2003 to 2008. The 2005 facelift brought styling revisions and powertrain refinements, including the 1.8-liter Easytronic variant detailed here, offering a blend of efficiency and reasonable performance.

Vauxhall Signum (Facelift 2005) 1.8 Easytronic: An Overview

The Signum was based on the Opel/Vauxhall Vectra platform, but distinguished itself with a more coupe-like roofline and a focus on interior space and flexibility. The “facelift” of 2005 included changes to the front and rear styling, interior trim, and available equipment. The 1.8-liter Easytronic model combined a naturally aspirated gasoline engine with a semi-automatic transmission, offering a different driving experience compared to traditional manual or fully automatic gearboxes. This model was primarily aimed at European markets where fuel efficiency and ease of use were highly valued.

Engine & Performance

At the heart of the 2005 Vauxhall Signum 1.8 Easytronic lies the Z18XER engine, a 1.8-liter inline-four cylinder gasoline engine. This engine produces 140 horsepower at 6,300 rpm and 175 Nm (129.07 lb.-ft.) of torque at 3,800 rpm. The engine’s naturally aspirated design, coupled with multi-port fuel injection, delivers a relatively linear power delivery. Power per liter is rated at 78 hp/l. The Easytronic transmission is a five-speed automated manual gearbox. It allows for both automatic and manual gear changes via steering wheel-mounted paddles or a sequential shift lever. While offering convenience, the Easytronic system was sometimes criticized for its shift quality compared to traditional automatic transmissions. Performance figures include a maximum speed of 207 km/h (128.62 mph). The weight-to-power ratio is 10.7 kg/Hp, and the weight-to-torque ratio is 8.5 kg/Nm.

Design & Features

The Signum’s body style is a five-door hatchback, offering a practical and versatile layout. It seats four passengers comfortably and provides a generous cargo area, enhanced by the hatchback configuration. The 2005 facelift brought subtle but noticeable changes to the exterior, including revised headlights, a new front grille, and updated rear light clusters. Inside, the Signum offered a reasonably well-equipped cabin for its time, with features such as air conditioning, power windows, and a CD stereo system. Safety features included ABS (Anti-lock Braking System). The Signum’s design prioritized a blend of practicality and style, aiming to appeal to buyers seeking a more individualistic alternative to conventional saloons. The vehicle’s dimensions are: Length 4651 mm (183.11 in), Width 1798 mm (70.79 in) including mirrors 2036 mm (80.16 in), Height 1466 mm (57.72 in), and Wheelbase 2830 mm (111.42 in).

Technical Specifications

Brand Vauxhall
Model Signum
Generation Signum (facelift 2005)
Type (Engine) 1.8 (140 Hp) Easytronic
Start of production 2005
End of production 2008
Powertrain Architecture Internal Combustion engine
Body type Hatchback
Seats 4
Doors 5
Fuel consumption (urban) 10 l/100 km (23.5 US mpg, 28.2 UK mpg, 10 km/l)
Fuel consumption (extra urban) 5.7 l/100 km (41.3 US mpg, 49.6 UK mpg, 17.5 km/l)
Fuel consumption (combined) 7.3 l/100 km (32.2 US mpg, 38.7 UK mpg, 13.7 km/l)
CO2 emissions 175 g/km
Fuel Type Petrol (Gasoline)
Maximum speed 207 km/h (128.62 mph)
Weight-to-power ratio 10.7 kg/Hp
Weight-to-torque ratio 8.5 kg/Nm
Power 140 Hp @ 6300 rpm
Power per litre 78 Hp/l
Torque 175 Nm @ 3800 rpm (129.07 lb.-ft. @ 3800 rpm)
Engine layout Front, Transverse
Engine Model/Code Z18XER
Engine displacement 1796 cm3 (109.6 cu. in.)
Number of cylinders 4
Engine configuration Inline
Cylinder Bore 80.5 mm (3.17 in.)
Piston Stroke 88.2 mm (3.47 in.)
Compression ratio 10.5:1
Number of valves per cylinder 4
Fuel injection system Multi-port manifold injection
Engine aspiration Naturally aspirated engine
Valvetrain DOHC
Engine oil capacity 4.9 l (5.18 US qt | 4.31 UK qt)
Coolant 5.5 l (5.81 US qt | 4.84 UK qt)
Kerb Weight 1495 kg (3295.91 lbs.)
Fuel tank capacity 60 l (15.85 US gal | 13.2 UK gal)
Max. roof load 100 kg (220.46 lbs.)
Minimum turning circle 11.92 m (39.11 ft.)
Drivetrain Architecture Front wheel drive
Number of gears and type of gearbox automatic transmission Easytronic
Front suspension Independent, type McPherson with coil spring and anti-roll bar
Rear suspension Torsion
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 215/55 R16
Wheel rims size 6.5J x 16

The Vauxhall Signum, in its various iterations, offered a compelling alternative in the European market. The 2005 facelifted 1.8 Easytronic model, while not a performance standout, provided a practical, reasonably efficient, and stylish option for buyers seeking a versatile hatchback with a touch of individuality.

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