YASA has shattered its own power density record with a new axial flux motor that produces more than 1,000 horsepower while weighing just 12.7 kilograms.
The Oxford-based EV motor specialist achieved a power density of 59kW/kg – roughly double the current industry standard. This breakthrough promises supercar-level performance without the typical weight penalties that come with high-output electric motors.
YASA’s new record destroys its previous unofficial mark of 42kW/kg, set earlier this summer with a motor that peaked at 738 horsepower from a 13.1kg unit.
Continuous Power Output Sets New Benchmarks
While the peak output exceeds 1,000 horsepower, the motor’s continuous power rating between 469-536 horsepower represents the more significant achievement for real-world applications.
The Mercedes-owned company focuses on axial flux motor technology, which offers far more compact packaging than traditional radial flux designs. YASA’s motors already power the 1,341-horsepower Mercedes-AMG GT XX, Ferrari SF90 hybrid, and Lamborghini Revuelto hybrid.
The motors use no exotic materials – making them more sustainable and cost-effective than competing technologies while maintaining their compact size and high energy density.
Prototype Undergoes Testing at Oxford Facility
The prototype motor is fully functional and currently undergoing testing at YASA’s headquarters in the Oxford Innovation Centre.
“On behalf of the entire YASA team, I’m proud and excited to so quickly follow up on the already remarkable results of our initial testing with this incredible result,” said Tim Woolmer, founder and CTO of YASA.
Woolmer emphasized the 750kW short-term peak rating and 59kW/kg density as major validation of their next-generation axial flux technology.
“It’s proof of what focused engineering innovation can achieve. And this isn’t a concept on a screen – it’s running, right now, on the dynos,” he said.
The motor uses scalable materials and processes – crucial for eventual mass production applications in high-performance automotive applications.
Simon Odling, YASA’s chief of new technology, noted the motor’s dyno performance has exceeded their most optimistic simulations. The team estimates continuous power delivery in the 350kW-400kW range – critical for sustained high-performance driving scenarios.
“This is real hardware, in real life, delivering real data – and it’s performing beautifully,” Odling added.
