Yeah, it's getting dated now and I'm planning on creating some new content shortly. That said, it's still highly relevant for most classic car owners, and large amounts of the developing world.
The old content is awesome and is never going to stop being relevant. I think the key to address the criticisms would be
1) Navigation - perhaps some sort of timeline that accompanies each article so that you can easily see the context that technology is in (e.g. direct injection <- fuel injection <- carburetor).
2) Edit the copy to ensure that old technology isn't identified as new. A quick glance turned up examples like: "Some high-performance engines do not have carburettors...".
