We should expect engine for Alt
ay more than 26 liters.
Look, great example for mighty engines for huge tanks .
https://en.m.wikipedia.org/wiki/Maybach_HL230
Having used aluminium parts they saved the weight .
But having been used aliminium parts in the engine, another problems appeared.
Metallurgical knowledge is the keyword.
http://defense-and-freedom.blogspot.com/2009/08/afv-mobility.html?m=1
Another important thing is mobility and fuel efficiency
The results looked like this:
Leopard 2A4: 720 l / 100 km
M1A1 Abrams: 1,478 l / 100 km
Leclerc: 1,380 l / 100 km
(The French claimed that their tank was still ill-prepared for the Swedish climate; their bad.)