About V4 Automobile (Car) Engine ?

Ford did two - the UK one and the German one which was also used by Saab. More compact possibly, better power to weight perhaps not as they will be shorter but wider. They do not have good balance and so require a balance shaft (i know some in line fours have these, but not a requirement) and you have to modify your production line. Cylinder head layout can be problem meaning its more difficult to get good gas flow, especially with the narrow angle V4's such as Lancia.