Opel Signum and Opel Vectra have the same engine power, the torque is the same for both cars. Opel Signum reaches 100 km/h speed 0.3 seconds later.
Fuel consumption
Fuel consumption (l/100km):
7.0
6.9
Real fuel consumption:
7.4 l/100km
7.0 l/100km
The Opel Vectra is a better choice when it comes to fuel economy. By specification Opel Signum consumes 0.1 litres more fuel per 100 km than the Opel Vectra, which means that if you drive 15,000 km in a year, the Opel Signum could require 15 litres more fuel. By comparing actual fuel consumption based on user reports, Opel Signum consumes 0.4 litres more fuel per 100 km than the Opel Vectra.
Both cars are similar in size. Opel Signum is 4 cm longer than the Opel Vectra, width is practically the same , while the height of Opel Signum is 1 cm higher.
Trunk capacity:
365 litres
500 litres
Trunk max capacity: with rear seats folded down
1410 litres
500 litres
Despite its longer length, Opel Signum has 135 litres less trunk space than the Opel Vectra. This could mean that the Opel Signum uses more space in the cabin, so the driver and passengers could be more spacious and comfortable. The maximum boot capacity (with all rear seats folded down) is larger in Opel Signum (by 910 litres).
Turning diameter:
11.4 meters
11 meters
The turning circle of the Opel Signum is 0.4 metres more than that of the Opel Vectra, which means Opel Signum can be harder to manoeuvre in tight streets and parking spaces.
