Autobianchi Primula

Before the Primula, all Fiat Group passenger cars were rear-wheel drive; the larger models followed the classic FR layout (front engine powering the rear axle), and small cars were rear-engined. Meanwhile, a practical concept emerged, namely the front-wheel drive layout with the engine mounted transversely, which allowed for very efficient space utilization. First popularized by the Mini, it also found its way to other, bigger models, starting with BMC's Austin/Morris 1100.



Fiat's chief designer, Dante Giacosa, recognized the potential of the concept, but the company decided to experiment without risking damage to the image of its popular Fiat-branded cars. Thus the Autobianchi Primula emerged—a car marketed under a less crucial nameplate, for which it was an entry into a whole new class of vehicles

The car's original body was similar to the BMC's fastback "saloon" concept, available with two or four doors and with or without the rear hatch (which made the car effectively a hatchback), producing four different combinations, referred to in Italian as "berlina". In 1965, a year after the original launch, the lineup was completed by the addition of a coupé model (effectively a more stylish and spacious 2-door fastback) designed by Carrozzeria Touring.


Engine  
1221 cc I4 OHV
1197 cc I4 OHV (Berlina)
1438 cc I4 OHV (Coupé)

Initially, the Primula was fitted with the 1221 cc engine from the Fiat 1100 D (for the coupé it was uprated to 65 hp (48 kW)), but in 1968 it was replaced with Fiat 124 engines—the berlinas received the 1197 cc 60 hp (45 kW) engine from the standard versions, while the coupé was fitted with the more powerful 1438 cc 70 hp (52 kW) unit. All engines used in the Primula had overhead valves (OHV)—the later twin cam derivative of the 1438 cc unit was not used in any Autobianchi (Fiat did use it later in the Lancia Beta- the issue at the time in a transverse installation of a twin-cam head being the arrangement of the exhaust manifold of the necessarily cross-flow head). Unlike contemporaneous BMC and Peugeot models, which had the transmission in the oil sump, the Primula had its manual transmission placed end-on, above the differential. The Primula also featured disc brakes on all four wheels, uncommon in small cars of the time.

The Primula's particular configuration of front wheel drive and transverse engine, but with a gearbox on the end of the engine, ingenious Fiat-designed clutch release mechanism and unequal length drive shafts, rather than a gearbox in the sump like the Mini, has become universal among front-drivers, as did its use of conventional steel suspension in almost all other cars except Citroens: usually McPherson struts at the front and a "dead" rear axle. The Primula is thus a car design of far greater significance than is often realised, as its design influence spread, far beyond even the mainstream high volume Fiats such as the 127 and the 128 of the late 1960s which used its driveline layout; to every front wheel drive transverse engined car in production today.