Currently buggy highest speed is 121. Comparing with others UAZ has 132, Dacia has 134 and coupe has 144. Buggy is mostly preferred by solo players or those who strategically stays away from teammates and for fast rotation.
The problems begins when a dacia or UAZ with full squad suddenly finds you. It becomes either 1v4 fight or 2v4 fight. As buggy has open tire , less vehicle health, 2nd person on buggy is full open. Buggy should get a significant improvement on speed or acceleration