Opel Signum is more dynamic to drive. Opel Signum engine produces 50 HP more power than Opel Vectra, whereas torque is 60 NM more than Opel Vectra. Thanks to more power Opel Signum reaches 100 km/h speed 2.5 seconds faster.
Fuel consumption
Fuel consumption (l/100km):
6.0
5.7
Real fuel consumption:
6.2 l/100km
5.8 l/100km
The Opel Vectra is a better choice when it comes to fuel economy. By specification Opel Signum consumes 0.3 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 45 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
no data
Opel Vectra has more luggage space. 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.
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.
