The difference is about an order of magnitude if you include the inefficiency of combustion. But specific power is just one metric. There are many others, which

The difference is about an order of magnitude if you include the inefficiency of combustion. But specific power is just one metric. There are many others, which are often (i.e. for commuting and even cross-country shipping) better for battery-electric. By the way, there is still a gap for energy density (i.e. energy/volume), but not nearly as bad. For instance, Gasoline is 34MJ/liter, but after combustion you get about 8MJ/liter. Tesla's lithium ion is about 2.3MJ/liter, so only a factor of ~3 difference. We don't all have 1000 mile gas tanks. In fact, in a sports car, you might only have a 300 mile tank. So clearly energy storage alone isn't the only metric. Wear and tear on brakes is much less. Brakes last for about the life of the vehicle. No oil changes are needed. No fuel filter, engine air filter, etc, etc. Cost for electric is much less. Typically, I pay about the equivalent to $1 per gallon in electricity. There's also a large reduction in local smog and particulates, which can make a big difference in a large city. This is why we're seeing a continued transition to electric transport, overcoming a century of inertia and trillions in stake. The only major thing preventing electric from taking over the majority of transportation is battery costs. That's it! And batteries have already decreased in costs dramatically to the point that cost of ownership is roughly break even right now even without incentives.