Power / torque curve for Clio 1.2 D7F engine

On most engines torque decreases well before maiximum power (bhp) output is reached. In fact power output can begin to decrease before maximum rpm is reached.

See the link below.

http://www.carfolio.com/specifications/models/car/?car=6457

Do a google search for any dynamometer graph.

Hey madnoel10, thanks for pointing me in the right direction :d

Of course maximum torque is not at the same point as maximum power, (what sort of idiot wrote that rubbish :forehead it's just that at 5252 rpm the power in bhp and the torque in lb/ft happen to have the same value, which is what I would have said if my brain had been working.

I changed my google search and with a bit of parallel thinking found a test torque curve for a Twingo with what I believe is the same engine.

The dynomometer graph is located at http://www.rri.se/popup/performancegraphs.php?Flap=Graph&ChartsID=479

It's not exactly what I wanted because it is giving power / torque at the wheels, rather than the flywheel which is what a manufacturers dyno graph normally shows, but it will do the job as it is the shape of the curve I was interested in. I think it's a little bit confusing when they talk about an 11% discrepancy against manufacturers figures - there will always be a shortfall due to drivetrain losses and I am wondering why they did not add those back to get flywheel figures ?

The graph seems to confirm my initial expectations, but I'm off now to do some more calculations. Nice to see the data table confirming power=torque at 5251 rpm, but have you seen how low the air pressure was when the test was being carried out - hence the 5.5% correction

For anyone else who is interested there are real world tests for another 27 Renaults - still interested the seeing an official flywheel graph