Opel Signum engine produces 3 HP less power than Opel Astra, whereas torque is 3 NM less than Opel Astra.
Fuel consumption
Fuel consumption (l/100km):
no data
8.4
Fuel tank capacity:
60 litres
52 litres
Dimensions
Length:
4.64 m
4.25 m
Width:
1.80 m
1.75 m
Height:
1.47 m
1.46 m
Opel Signum is larger. Opel Signum is 39 cm longer than the Opel Astra, 5 cm wider, while the height of Opel Signum is 1 cm higher.
Trunk capacity:
no data
380 litres
Trunk max capacity: with rear seats folded down
1410 litres
1330 litres
Turning diameter:
11.2 meters
10.5 meters
The turning circle of the Opel Signum is 0.7 metres more than that of the Opel Astra, which means Opel Signum can be harder to manoeuvre in tight streets and parking spaces.
Opel Astra has fewer problems. According to annual technical inspection data Opel Signum has serious deffects in 30 percent more cases than Opel Astra, so Opel Astra quality is probably significantly better
