Is the Sbr4 slower?

Hope this is the right place to post this, if not please tell me and i will remove it.

**To be clear this is not a complaint post, just an observation that i am unsure of.

I find the Sbr4 is somewhat slower in the new update, as It seems to run about 3 tenths of a second slower to 62mph (100kmph). Furthermore on the "Highspeed Highway" scenario i am running times around 2:03-2:05, which is quite a bit slower than my previous personal best of 2:00:43, and whatever i do i cant seem to reach times matching pre-update. Am I crazy or is the Sbr4 slower? My assumption is that the turbo coding has slowed the car somewhat, which makes some sense considering it is a turbo and relies on boost to produce its power, which is not as reliable power-wise as purely NA engine. Otherwise the car's handling does seem more twitchy, in that it is easier to enter corners with or change direction in a corner(**without esc)
Grip seems about the same (with the tts2 tires and rims), although some testing tells me it was about .1-.2 g off what i was finding before the update, though that can be clocked down to experimental error. The tts2 rims being overly bendy has been fixed it seems however.

tldr; Is the sbr4 slower due to the new turbo coding, or have i lost my marbles?

 

turbo lag I think probably is playing into it