Vexter XS is a Tier 2 Street Class car. This means that it can be purchased once first set of cups are beaten. It's stats are as follows:

Unupgraded
Top Speed: 4.0
Acceleration: 6.6
Handling: 3.2
Strength: 5.0
Weight: 4.8
Nitro: 3.4

Upgraded
Top Speed: 6.4
Acceleration: 7.8
Handling: 5.5
Strength: 7.2
Weight: 4.8
Nitro: 3.4

Because most cars do not change Top Speed even if upgraded, Vexter XS'es Top Speed is a respectable 271 kmh.

Upgraded version doesn't include Nitro upgrade as it's broken.

Main reason for why Vexter XS is hated mainly comes from broken Nitro upgrade mentioned earlier - buying Nitro upgrade only hinders your performance, as it lowers car strength without actually boosting Nitro, even if stats say otherwise. Additionally, people prefer to use Speedshifter as it has higher top speed and acceleration.

In my opinion, Vexter XS doesn't need the Nitro upgrade. In fact, neither do Insetta Sport and Sunray. You see, Insetta Sport, Vexter XS and Sunray all make a FWD car chain. Knowing this, we have to ask ourselves what playstyle should FWD cars favour...

Here's what catches most people. FWD cars require specific playstyle to use its full potential. I like to call it the "high accuracy" drive style. Basically, these three cars reward knowing how FWD cars behave by allowing you to pass corners much better than RWD cars. Of course, Sunray can get away with being driven normally due to being a Tier 3 car.

In fact, knowing this I can assure you the entire street class career including finals is beatable only in the Insetta Sport. But what does it have to do with Vexter XS? Just like Insetta Sport, it's insanely good at cornering. You'd be shocked at how well you can pass corners with it. Not only that, but Vexter XS fixes all problems that Insetta Sport has - it has better acceleration and higher top speed, while still being able to deal damage.

I honestly enjoy driving Vexter XS, especially in Single Race mode. The car is just good - it rewards high accuracy driving and smart combat decisions. It's faster than most people think it is. I'm a person who picks Insetta Sport because I want to challenge myself and show you can win against bots even in slower cars, so I can say that Vexter XS is a car that can give me some room to breathe while still keeping the challenge up.