The width of the car influences directly on passanger's inner room and stability of driving. The Opel is 43 mm wider than the Pontiac. It is clearly perceptible by driver and passenger in front, who have more room for their elbows.
The wheelbase of a vehicle is the distance between its front and rear wheels. The wheelbase significantly affects the driving because of more desirable vehicle's weight distribution. Opel has 110 millimeters longer wheelbase distance in comparison to Pontiac Sunbird II. Wheelbase dimensions are important to the balance and steering. Thus, the mass of Opel Kapitan IV should be better distributed and driving should be smoother and safer.
The Opel Kapitan IV is 407 mm longer in relation to the Pontiac. Long cars have roomy cabin and in most cases have more storage space. While the Opel Kapitan IV 2.5 68HP seems to be better for families or drivers who love the idea of comfortable driving, the Pontiac Sunbird II may be more appropriate to singles because it will not cause troubles with parking and will have smaller turning radius.
Number of doors
For drivers that are looking for a vehicle for more than two persons the 4-door Opel Kapitan IV 2.5 68HP is much appropriate to use. Nevertheless, for those who value more attractive look of the vehicle we recommend to choose the two-door Pontiac Sunbird II 1.8 85HP.
If you are a tall driver or you happen to carry in the trunk stuffs of large dimensions, the Opel Kapitan IV, which is by 19 % higher than the Pontiac Sunbird II, would be better choice for you. However, compared cars do not vary much when it comes to its height and it should not be much observable.