'79 vs '81 gearing difference

[nwmike]

I've had an '81 spider for many years and recently bought a '79 spider 2000 from a friend who needed to sell it quick. One thing I've noticed is the '81 is quicker in that it travels farther and faster from a stop at the same rpm. So what is different? Is it the transmission or the rear end gearing that's different? I know the fuel injection on the '81 vs carburation on the '79 makes a difference in power, but this seems to be a gearing difference. Does anyone know?

[RRoller123]

The FI added a lot of horsepower! And much smoother low end torque and response.

[vandor]

If all is stock then there is no gearing difference between 1979 and 81.

[Frog2Spider]

If all is stock then there is no gearing difference between 1979 and 81.

Vandor, is that true of BOTH rear end AND the 5spd. transmission?

Thanks,
Dave

[vandor]

Yes. The manual states a different 5th gear ratio for 1979-80 (I think), but I have not actually seen that in real life.