Strictly the subject of rumors not long ago, Aston Martin’s upcoming Vanquish Zagato Speedster has been spotted testing. The limited edition model has been penned by Italian design house Zagato and features a 592-horsepower V-12 under its long hood.

Ford revealed its updated Mustang earlier this year, however, the automaker held back on most of the specs. Some of them were revealed overnight, including power and torque figures for the Mustang GT.

The previous-generation Dodge Viper ACR set a production car lap record at the Nürburgring in 2011. Dodge never attempted the same with its latest Viper ACR, but fans of the car have banded together to fund their own effort. The time to be beat is the 6:52.01 set by the Lamborghini Huracán Performante last October.

You'll find these stories and more in today's car news, right here at Motor Authority.

2018 Aston Martin Vanquish Zagato Speedster spy shots

2018 Ford Mustang GT does 0-60 mph in under 4 seconds, has 460 horsepower

Dodge Viper ACR prepares for Nürburgring lap record assault

18th Takata death likely in Australia; Ford asks not to recall 2.5 million airbags deemed unsafe

Mercedes-Benz to ditch DTM for Formula E

Green Car Glossary: vehicles, emissions, fuels, electric cars, powertrains energy

Mazda CX-8 first look: a new 3-row SUV for Japan

2017 Chrysler Pacifica Limited long-term test: how much does the vacuum suck?

Toyota electric car to use solid-state battery, arrive in 2022

Electric Mini may not be made in UK, or perhaps it will be