Review
Even a heavy facelift has done little to raise the appeal of the Signum. In essence it's a reworked version of the standard Vectra with a large hatchback to the rear and an increased emphasis on interior comfort and equipment. Originally pitched as being an executive choice, reality has since seen its marketing spiel downgraded to claims that it's more practical than the existing Vectra saloon and hatchback. Which it is - just - although nowhere near as spacious as the Vectra estate.
Exterior styling is very similar to the Vectra, including the same revised, Astra-like front grille and headlamps. The cabin is pretty much identical, too - with the same well-designed dashboard and spacious front seat environment. In the back the Signum gets clever, with sliding rear seats that allow passengers to maximise legroom (at the expense of luggage space). Generous standard equipment means that even the most basic versions come considerably more kit than cheaper Vectras, with four electric windows, stability control and satnav as standard.
Composed driving manners make the Signum a fine long-distance companion. Excellent refinement helps to absorb long motorway journeys painlessly - while the compliant ride is good for taking the edge off bumpier roads. Keen drivers will look in vain for any kind of intimate dynamic connection, though - the Signum responds predictably to driver inputs and possesses plenty of grip, but there's little fun to be had from hustling it along.
The engine line-up shadows that of the Vectra - although there's no Signum VXR. Even the basic 1.8 litre petrol gives decent urge, although you'll have to look further up the range for excitement. The strong performance of the 2.0 litre petrol turbo and the range-topping 3.0 litre V6 CDTi turbodiesel make them the stand-out powerplants.