It is no secret that you can control a wide variety of smart home devices with an Amazon Echo. These devices get smarter all the time. As jryanishere has demonstrated on YouTube, it is possible to start a car using an Amazon Echo. You will need a bunch of components and a bit of coding to pull this off.
The developer has used his Echo to control a variety of devices in the past, so controlling a car was the next logical step. You can find out more about this project on jryanishere’s blog.