Does the amount of displacement directly affect a cars speed? Ex. Is a Jaguar Xtype 2.5L slower than a Jaguar Xtype 3.0L?
Top speed is governed by gearing and power. The longer the gears, the more theoretical top speed you have. However, the faster you go, the more power you will need to be able to overcome the frictional effect of drag. Therefore providing that gearing isn't the limiting effect (which it won't be) then therefore the 3.0l engine will be faster than the 2.5 because it creates more power.
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