Tesla is promising that the production version of the new Roadster will be even better than the head-turning prototype unveiled a couple of years ago.

While recently speaking on the Ride the Lightning podcast, Tesla chief designer Franz von Holzhausen said that the all-electric supercar is still undergoing developent: “It’s evolving deservedly so; it needs more time. It will be even better than what we’ve unveiled. In every way.”

While von Holzhausen failed to reveal what will differentiate the finished item from the prototype, his statement that it will be improved fits in line with previous statements from chief executive Elon Musk that the electric car manufacturer is working on a number of unique components for the car.

Also Read: Tesla Could Build Up To 10,000 Roadsters Per Year, Says Elon Musk

Most notably, Musk has previously stated the Roadster will be available with a ‘SpaceX package’ that includes small rocket thrusters to help the car’s acceleration, aid in braking and cornering, and bump up the car’s top speed. These rocket thrusters could also help the Roadster hover, making it the first Tesla with such a capability.

At the Roadster’s unexpected unveiling back in late 2017, the company revealed that it will have a 200 kWh battery pack, new powerful electric motors, accelerate to 60 mph (96 km/h) in just 1.9 seconds and sprint through to a 250 mph (402 km/h) top speed. If these already mighty figures are indeed improved for the production model, then we could be looking at something even more extraordinary.

“We’re going to do things with the new Roadster that are kind of unfair to other cars. (It’s) crushingly good relative to the next best gasoline sports car,” Musk said earlier this year.