This may prove way too maintenance intensive for normal everyday road use. Seems to need special lubricants as well. If they did 200BHP from a 1.5 it would be OK for most purposes. It won't be the first concept / demonstrator that doesn't make it into ordinary peoples lives when faced with real-world challenges and conditions.
Also the engine in the pictures seems to be missing a gearbox, differential etc. which would seem to be quite important, and more to the point quite heavy. Huge power is available from gas turbine engines, which are quite light in themselves up until the point you consider adding stuff to make them usable in a vehicle + fuel consumption.
A modern superbike engine can get 230BHP from a normally aspirated 1000cc engine which if you scale it up to 1500cc is 350BHP, imagine if you added a turbo to one of those. and the whole motorbike only weighs about 350lbs = 160KG.
Guy Martin recently entered a turbocharged Suzuki GSX-R1100 into Pikes Peak race (14,500 foot American mountain) with about 300BHP at rear wheel (would have been more but the ECU had problems getting the fuel / air mixture correct). Turbo was to try and make up the 30% power loss at 14,500 feet, which also affects the human body and brain in bad ways due to lack of oxygen - there is also a race for electric cars and motorbikes, which don't suffer from power loss and you could probably re-charge battery by rolling back down the mountain
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