Displacement

[Hellbilly]

I\'ve seen twin-rotor 13B\'s described as 1300cc and 2600cc; which is it?

How do you calculate the displacement of a rotary, anyway?

[richrx]

the 3rd gen is a 1300cc, although for various reasons there described and classed as 2600cc

[Hellbilly]

What reasons?

[Fish]

Its due to an early agreement between Mazda and the DVLA. Like the FIA, the DVLA didnt know how the properly work out the displacement of a rotary.

13B = 2*654cc

But when you think that each rotor has 3 sides, it should in fact be 3924cc\'s.

Dan

[Grizzly]

Take your Pick.

2 X 654cc
or
1300cc
0r
2600cc
or
3900cc
?

There is an argument for each, i personaly like the 3900 theory. It seems to make more sence.

But i guess Mazda know best.

Chris

[johnf]

"I\'ve seen twin-rotor 13B\'s described as 1300cc and 2600cc; which is it?"

If your buying a car already registered in the UK it\'ll be whatever it says on the log book [can be either] - mine\'s 1300 so I quite enjoyed paying the lower road fund licence.

[g11ary]

The ones I had with 2600 on log book I hd changed to 1300.

It should ALWAYS be quoted as 1300, coz I just love the look on the porker,rarri, & lambo owners faces when I tell them that my ickle 1300 has just crapped all over them