I’ve notices that for the most part, below 2 litres in capacity, cars petrol engines seem to come in even sizes; 1.2, 1.4, 1.6 etc and diesels in odd numbers; 1.5, 1.7, 1.9 etc
Now, I know that if the badge on the back of my car denotes an engine size (in my case) of 1.4, it means that the engine size is close to that (again in my case, its 1397 or something similar.) And I know that there are other diesels such as the new VAG 2.0 litre diesel.
But is there any reason why roughly even numbers should be preferable for petrols and odd for diesels? 1.9 in particular seems popular for diesels, any reason for that?