Does the weight of Artillery and Anti Tank Gun affect movement range?

[Demonmercer]

I'm pretty sure it doesn't but don't wanna find out the hard way. Oh and do electric engines have more horsepower than diesel engines? Thanks for the help dudes.

[zgrssd]

It does not. Unless they are mounted on a tank, their weight is totally irrelevant.

[Don_Kiyote]

No.

Not really, except when it does. See this thread:A few suggestions: Light Infantry, Artillery, and Caliber Rebalancing

In short, only when being motorised transported, and due to the implied higher ammunition usage of heavier guns; but not otherwise for simple artillery units.