Not to mention if you have seen a mx5 after a collision its clear it isnt as stout as an s2k

 

It's because the Boxster costs twice as much

 

 

They do not weigh the same.
2008 non-CR S2000: 2864 lbs
2008 Boxster S: 2987 to 3075 lbs.
That's 123 to 211 lbs heavier.

With an MSRP that's $21,400 more than the S2000, it's possible that they simply have a greater amount of lighter, yet more expensive, materials.


If we look at each manufacturer's lightweight specials:
S2000 CR, no top, no AC, no radio, no spare - 2765 (99 less than std.)
Boxster Spyder, 6 spd, no top, no AC, no radio, inflatable spare - 2811 (264 to 176 less than std.)

The Honda is still lighter, at 46 lbs less. Of course there are some other differences (17 vs 19 inch wheels [although Porsche says they're the "lightest available" they have], 237 vs 320 hp.) What I find interesting is how much more weight loss the Boxster Spyder went through - I wonder if the Porsche's more complicated top was a major component of that? Still, the numbers suggest to me that the weight difference is likely a factor of the respective frames, engines, transmissions and other non-optional running gear.

So I'm inclined to believe the major component of the S2000's weight is its frame, as pictured above.

(The fuel economy difference is negligible, IMO. 21 vs 22 combined according to EPA. Per their website, that's a only a $92 per year difference in fuel costs. About half a cent per mile.)

 

Doubtful, since the S2000 has an aluminum block as well.

 

Remember, Honda is no pro at making convertibles or sport cars - The S2000 was basically a one-off. With experience, it probably could have made a lighter S2000 based on improving the frame design alone.

 

Honda made the s600 in the 60's, they don't have a track record like Mazda but it's not the first.

 

You can't possibly believe that the S600 had anything to do with modern roadster construction. That is like saying the Boeing 777 is based on the Wright brothers' original airplane.

 

Honda could have reduced the length of the car, if you've been around you know there are ls1's fitting into the engine bay of the s2000.

I know why they did that (weight balance) mostly, but it's not like it's finger tight in the engine bay.

 

Still, they have engineered a convertible in the past. And it's not like they hacked up a non-convertible to make it convertible like most manufactures.