We’ve already reported that Alfa Romeo->ke1386 is building a Spider version of its hotly-anticipated 4C Coupe, but the current rumblings in the rumor mill is the car will be powered by the Chrysler->ke21/Fiat->ke30 1.4-liter in-line four-cylinder currently used in the Dodge Dart and Fiat 500 Abarth.

That engine produces a decent 160 horsepower and 184 pound-feet of torque in the Dart, and 160 horsepower and 170 pound-feet in the 500 Abarth. Speculating that the Alfa Spider will want more gusto, count on a modest bump on both output numbers. Thankfully, that 1.4-liter will be mounted longitudinally for rear-drive duty and has a high probability of being mated to a manual transmission.

The rumors come way of Car & Driver, who report Alfa Romeo has partnered with Mazda->ke53 in constructing the new convertible. It will likely keep much of its 4C roots, but will share many parts with its Japanese counterpart. It’s also said nearly all suspension components will be aluminum. Other weight-saving materials and techniques will be used to make the most of the four-banger.

What’s more, Alfa is said to be bringing the new Spider to the Geneva Motor Show->ke228 going on March 4th and 5th with its body featuring a few cosmetic changes compared to the 4C. New, less alien-like headlights and new wheel designs are two of the prominent changes. Check back with TopSpeed for all the details.

Click past the jump to read more about the next Alfa Romeo Spider.

Alfa Romeo Spider

Details about the Alfa Romeo Spider and next-generation MX-5 Miata have generally been fairly scarce, but as we’ve reported before->ke1026, the two cars are being developed together in a joint partnership between Alfa Romeo and Mazda. Both cars will enjoy their own unique styling, but will share many of the same important greasy bits under the pretty bodywork.

A total of 220 pounds has reportedly been cut from the new twins when compared to the current-generation MX-5. We wouldn’t be surprised if Mazda tried its hand at carbon fiber, especially with the more exotic Alfa helping in development. Early news about the development pointed to each car getting their own in-house powertrain. That is still a possibility as Mazda will likely want something with the SkyActiv nomenclature attached, and as mentioned before the jump, the Alfa will benefit from its ties with Chrysler/Fiat.