Underneath the Rolls-Royce Spectre will be a dual-motor drivetrain similar to the BMW iX M60.
"Autocar has a lengthy article about the company’s first electric vehicle, which won’t be based on an existing platform by BMW. Instead, Rolls-Royce will use a bespoke architecture, though it doesn’t have its own electric powertrain. Developing one from scratch would require tons of money and a lot of time, and Autocar reports the Spectre could use the drivetrain that is currently under development for the BMW iX M60.

According to early reports, this new dual-motor setup will give the iX approximately 600 horsepower reaching all four wheels. This should be enough power for the large and heavy SUV to sprint from a standstill to 62 miles per hour (0-100 kilometers per hour) in about 4.0 seconds. Such numbers seem like a good replacement for Rolls-Royce’s legendary V12."