[josefresco]

2005 accord is 5 inchers longer, a couple inches wider and has a longer wheelbase. This results in larger interior space and trunk space. While cars are in fact getting bigger and heavier, in this case it's not as egregious.

[riku_iki]

you also could compare internal dimensions between 3: 2005 accord vs 2025 civic vs 2025 accord, I kinda believe 2025 civic will be closer to 2005 accord.

But I mostly referred on class in general: 2005 accord was basic appliance economy car, while 2025 accord has many more accura like luxury features besides drivetrain.