Strangely my engine seemed to feel it's freeest after about 20k! Since then has felt brill. Also as above depends on RPM. 5500+ for most fun ...You actually feel the power change. And also (although you shouldn't do it anyway) there is a chance that if the engine is not fully warmed it will feel to have half the power it should. Cold start behaviour is a little strange on the 197's and 200's believe this is a known issue anyway but once it's warm it'll free up ...