Two Coupes with some similarities, but otherwise different in most aspects such as the modifications, starting price, horsepower, market segment, fuel economy, ground shadow size, and height. First of all, there is a $164,600 difference in the base MSRP. The 2016 McLaren 675LT Coupe has a higher starting price than the 2016 Porsche 911 Coupe R. Also, although the 2016 675LT Coupe has a more powerful engine than the 2016 911 Coupe R, it gets 2 more mpg. In addition, comparing the dimensions we see that the 675LT Coupe is slightly larger, although it's shorter than the 911 Coupe R. Among similarities are the body structure, market segment, and maximum occupancy.