Opel Vectra is more dynamic to drive. Opel Vectra engine produces 20 HP more power than Opel Signum, the torque is the same for both cars. Thanks to more power Opel Vectra reaches 100 km/h speed 0.3 seconds faster.
Fuel consumption
Fuel consumption (l/100km):
11.0
11.2
Real fuel consumption:
12.4 l/100km
11.1 l/100km
The Opel Signum is a better choice in terms of fuel economy based on user-reported consumption, although the specification shows otherwise. By specification Opel Vectra consumes 0.2 litres less fuel per 100 km than the Opel Signum, which means that by driving the Opel Vectra over 15,000 km in a year you can save 30 litres of fuel. But when we compare the real fuel consumption reported by users, Opel Vectra consumes 1.3 litres more fuel per 100 km than the Opel Signum.
Fuel tank capacity:
61 litres
60 litres
Full fuel tank distance:
550 km in combined cycle
530 km in combined cycle
490 km with real consumption
540 km with real consumption
Dimensions
Length:
4.61 m
4.65 m
Width:
1.80 m
1.80 m
Height:
1.46 m
1.47 m
Both cars are similar in size. Opel Vectra is 4 cm shorter than the Opel Signum, width is practically the same , while the height of Opel Vectra is 1 cm lower.
Trunk capacity:
500 litres
365 litres
Trunk max capacity: with rear seats folded down
500 litres
1410 litres
Even though the car is shorter, Opel Vectra has 135 litres more trunk space than the Opel Signum. The Opel Signum may have more interior space, so the cabin could be more spacious and more comfortable for the driver and passengers. The maximum boot capacity (with all rear seats folded down) is larger in Opel Signum (by 910 litres).
Turning diameter:
11 meters
11.4 meters
The turning circle of the Opel Vectra is 0.4 metres less than that of the Opel Signum, which means Opel Vectra can be easier to manoeuvre in tight streets and parking spaces.
