The Vantage GT4 isn’t all that different from the road going Vantage V8. It has the same 4.7liter V8 engine but the engine gets a remap offering more power than the standard 420bhp/470Nm Torque it currently makes. Aston Martin is still silent on the figures at the moment but the engine should give better throttle response than before.
The changes to the bodywork aren’t radical. The Vantage GT4 gets some aerodynamic aids in the form of a revised flat underfloor (which channels more air to the transmission oil cooler) as well as the front splitter/bumper, rear bumper with a larger rear diffuser and bootlid spoiler from the larger engine road going Vantage V12. It also gets the Vantage V12’s rear light cluster. So basically, this is a slightly tuned Vantage V8 running the Vantage V12’s clothes and it has a roll cage, racing tires and other racing safety equipment.
The Vantage GT4 race car can now be specified with the option of having a Bosch ABS system and traction control instead of just being a pure, mechanical-human control interface. Some like the pure ABS-less, traction control-less feel but some, being affluent businessmen who just like to indulge in motorsport would feel the need of having these systems. I suppose this is to cater for the one make Vantage GT4 racing series more than for the more ‘serious’ FIA GT4 championships.