Originally Posted by gagliano
How does this correlate to anything? Engines are not the same over the years for a specific model, neither is the body style. When aerodynamics and engine efficiency are not constants how does this tell us anything? It would be interesting to see the numbers by swapping engines from the 90 and 08 Accords or the the same for any of the other models listed.
Weight is a proxy for physical size and density of required and simply tacked-on extra equipment such as emissions controls, powered seats, airbags up the wazoo, strong A-pillars and the like. What my admittedly very rudimentary graphs show, and which surprised me, is that improvements in all the other factors (efficiency of the engine, more speeds on transmissions, better aerodynamics, etc.) basically have compensated for the increased girth in nominally equivalent models over the years.