To provide maximum traction and stability on all roads, Full-Time Four-Wheel Drive is standard on the Spectre. But it costs extra on the Taycan.
The Spectre has a standard blind spot warning system that uses sensors to alert the driver to objects in the vehicle’s blind spots where the side view mirrors don’t reveal them. A system to reveal vehicles in the Taycan’s blind spot costs extra.
To help make backing out of a parking space safer, the Spectre’s standard Cross Traffic Warning uses sensors in the rear to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The Taycan doesn’t offer a rear cross-path warning system.
The Spectre’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The Taycan doesn’t offer a driver alert monitor.
Both the Spectre and the Taycan have standard driver and passenger frontal airbags, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, lane departure warning systems and rearview cameras.
The Rolls-Royce Spectre weighs 1172 to 1803 pounds more than the Porsche Taycan. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts.

