Is there a bigger engine available bigger than a 2.5 ?

Hello, whereas a larger engine could be offered in this vehicle, it's worthless to look into it, as installing it would change absolutely everything, including the entire wiring system, the entire exhaust system, the entire control system networking of computers, possibly interior components and electronics also, parts of the fuel system, the suspension, maybe even the transmission... By the time you figured out how to retrofit all of this successfully, you'd have been better off to buy the car with power that you want. Seriously. With all the controls of a vehicle, it's just prohibitive.

Spend some time researching applicable engine modifications instead... There are lots of ways to add horsepower while remaining street legal and EPA approved .. Keep in mind it 'can' get expensive!