I really don’t understand the claim that the REX engine is noisy. I drove one and was a passenger in one for about 40 mins and really struggled to hear it! I do wonder if they are just looking to repeat some other journalist’s unresearched remark to make comments like this - 'That’ll be the unsuppressed chug of the moped engine waking behind you, puncturing the ambience’. Not least to use such a disparaging remark as to claim it is a 'unsuppressed moped engine’ really shows the total lack of knowledge.