Anything different from a boxer engine fitted to the Toyobaru will automatically defeat its purpose. The boxer engine is it's secret as it is with Porsches.
Nico Rosberg>Kamui Kobayashi>Fernando Alonso>Lewis Hamilton>Sebastian Vettel>Jenson Button>Mark Webber
"If you like to drive on rails you can always take the train."
Andre de Vries
... "If you want pace and fun, just add lightness!"