The data indicates that virtually all SMART FORTWO (2003-07) vehicles are equipped with a 698cc engine capacity, accounting for 100% of the sample. In terms of fuel type, petrol is overwhelmingly the primary fuel, used in 99.5% of these vehicles, with a small 0.5% running on gas bi-fuel systems. This suggests that during this model period, the standard configuration was a 698cc petrol engine, with negligible variation in engine size and fuel type.