The 849 Testarossa’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The 911 doesn’t offer pre-crash pretensioners.
To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the 849 Testarossa. But it costs extra on the 911.
The 849 Testarossa 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 911’s blind spot costs extra.
To help make backing out of a parking space safer, the 849 Testarossa has standard rear cross-path warning, helping the driver avoid collisions. Porsche charges extra for Rear Cross Traffic Alert on the 911.
Both the 849 Testarossa and the 911 have standard driver and passenger frontal airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, lane departure warning systems, rearview cameras, driver alert monitors and available around view monitors.


