Koenigsegg Regera - Hybrid - $2 Million with 1500
Horsepower, Single-Speed Gearbox
You'll also find a pair of rear-wheel mounted electric motors that
produce a combined 720 horsepower. Together, the complete system
produces a whopping 1,500 horsepower. (Unfortunately, you can't
simply add up the power output of the internal combustion and the
electric motors).
And then there's the transmission. It
doesn't really have one in the traditional sense.