Since the release of the High Life update to GTA 5, the roads have got much louder as the DLC brought with it 3 new vehicles along with motorbikes.
One of these is a super car, one a sports car and the other an SUV of the high end. In the video below you can see a bird’s eye view and the car does seem to be modelled around the Bugatti, the sports car has the Aston Martin look, while you can see that the SUV is based on the Hummer.
The motorcycle is thought to be the Dinka Thrust, which is based on the Honda brand name.