mechanically, the panda borrowed heavily from the fiat "parts bin", using engines and transmissions from the fiat 127. the engine is an inline four-cylinder with 40 ps (29 kw) and 903 cc. this proved adequate for this light car which weighed in at about 680 kg. a kit to make a more powerful seat panda abarth version was also on offer, sold in spain by a company called apicsa. shortly after introduction, a smaller-hearted version corresponding to the italian two-cylinder model was added. called the "panda 35", it had a smaller 843 cc version of the engine, a development of the engine originally fitted to the seat 850 beginning in the mid-sixties. to set it further apart from the "45", a lower compression rate was chosen. nonetheless, the smaller engine had to work that much harder to keep up, and in practice the fuel economy savings were negligible.