v8's have better puling power
a 6 cycle (straight type turbo or a 4 cycle) wont have torque down lower
the v8 will redline to 6000rpm for example
the 4 cycle will redline at 8000rpm
the 4 cycle will weight less than the v8,
and the list can go on
a good way to put it, is if you had a huge bar, huge metal pipe or something, and you put it on yoru wheel nut, and you let it idle normaly, put it in gear, and you grab the metal bar, the amount of force you apply on the metal bar to prevent the car from moving is called toqure, it's the force required to move something, aka energy.
v8's generaly have bigger pistions than a 4 cycle, hence the bigger redline mark, the direct result of bigger pistions is more kw and more torque
a v8 in theory will be beaten of the line by a turbo, but a v8 will catch a turbo given the right lenght of road, it's all about power distribution, the higher the revs on a v8 the lease amount of torque and more amount of kw. where a turbo is the other way around.