Earlier quoted context omitted.
V8 has little to do with Oracle, fundamentally. V8 came about because they wanted a higher performance JS VM for their browser; the JVM was never in contention there.
In underlying code you are correct. But they both work in a C/C++ style. JavaScript has become a 'Write Once, Run Anywhere' foundation because of the web browser. Don't forget projects like NWJS (Node Webkit), Electron, Cordova/PhoneGap, Google Chrome Apps, NodeJS, and ClearScript(.NET). All of these JavaScript implementations use the V8 JVM and can make desktop and command line application. Depending on security set…
V8 is not a JVM (Java Virtual Machine), but a virtual machine for Javascript.