It's more a question of torque than power.
There are some 2.0-litre lumps running some big figures in both power & torque. I'd probably say anything above 450lbs is on borrowed time if run hard.
I would suggest the torque figures being quoted are on the higher side of life...
I know my own LC on "other" dyno made +20bhp more than mine but some 100lbft more also, which is just tosh
I had an ED30 for dyno earlier this week..
thought to be 360bhp, 348bhp was reality on my dyno, and 315lbft
Are these really 400lbft cars on stock k04?