Revved up by new owner Audi, Silvercar Inc. is launching its airport car rental services in Seattle on July 31.

Launched in 2012, the Austin, Texas-based startup operates a car rental platform accessed entirely by app and using all silver Audi A4s. Silvercar will be active in more than a dozen markets by the end of August.

Silvercar is upgrading its fleet with new 2017-18 A4 models. All of its cars come with Wi-Fi, GPS navigation and SiriusXM satellite radio at no additional cost.

Silvercar announced…