on my old celica vvtli 190 (gts)
i had an apexi rsm with speed sensor.
this gave a live PS reading and on each journey logged peak/max.

it must have been quite accurate, as my 190bhp, showed this sort of figures on some morning spirited drive.

is there anything else which gives reading like this?

 

I’m not aware of any aftermarket device you can install that measures bhp or ps. A device that accomplishes this would probably need to be OEM equipment designed specifically for the car. I don’t think Nissan has anything like this (except possibly the GTR which has an extensive computer/display for many diagnostics).

Incidentally, many readers here may not know the definition of bhp (Brake Horsepower) or ps (Pferdestärken). In the States, horsepower is measured with an SAE standard that uses a dyno measuring output at the car’s wheels. Everything in between is ignored.

I only mention this because it’s a reason you may not receive many responses to the question in your thread.

--Spike