I have a guy telling me that the Accord chassis has been almost the exact same since 1990, just had tweaks and minor modifications on the same chassis over the years to make it more rigid and such.

Is that true? If not, can you please get me some info to show him to prove otherwise?

He's a mechanic and claims that he's seen plenty of Accords from underneath and they all look essentially identical in terms of the chassis from 1990 onward.

I really really doubt it.

He also says the Camry has been unchanged since 1992, though I'm pretty positive that it was redesigned from the ground-up (including the chassis) in 2002, at least.

 

Well essentially they're the same, as in the underpinnings have the same basic design. There was an entire platform change in 1990 for the 1990-1993 Accord that was carried over with minor changes for the 94-97 version. The 98-02 Accord, 03-07 Accord as well as every other midsize Honda car resides on the new 'global midsize platform'. Technically, the Accord has been riding on the same platform since 1998 with minor tweaks. But if you go back to the early 1980's you'll find the same components you find in a new Accord: double wishbone front suspension, multi link rear suspension, etc.

 

So in what was changed for 1998? Or not changed? Whichever one is easier to answer.

 

The entire platform was reworked. I don't work at Honda so I couldn't tell you, but I know that the platform was lengthened, strengthened, and just about everything else.

 

It depends on how you look at it. 1998 was the beginning of a new generation (6th) so pretty much everything was changed. But it seems like the basic design philosophy was the same. A casual look at the front suspension says they're the same. But I bet if you take '97 & '98 parts side-by-side & actually measure them, they'd be different.

Same with 2003 being the beginning of the 7th generation. The front suspension & brakes look identical. But I bet you can take individual parts & measure them & they'll be different.