The Chevrolet Vega is a subcompact automobile manufactured and marketed by GM's Chevrolet division from 1970 until 1977. Available in two-door hatchback, notchback, wagon, and sedan delivery body styles, all standard models were powered by a inline four-cylinder Chevrolet 2300 engine designed specifically for the Vega, with a lightweight aluminum alloy cylinder block. The Vega first went on sale in Chevrolet dealerships on September 10, 1970. Variants included the Cosworth Vega, a short-lived limited-production performance version introduced spring 1975.
The Vega received the 1971 Motor Trend Car of the Year. Subsequently, the car became widely known for a range of problems related to its engineering, reliability, safety, propensity to rust, and engine durability. Despite numerous recalls and design upgrades, Vega's problems tarnished its reputation and that of General Motors. Production ended with the 1977 model year.
The car was named for Vega, the brightest star in the constellation Lyra.
History Chevrolet and Pontiac divisions worked separately on small cars in the early and mid 1960s. Ed Cole, GM's executive vice-president of operating staff, working on his small-car project with corporate engineering and design staff, presented the program to GM's president in 1967. GM management chose Cole's version over proposals from Chevrolet and Pontiac, and gave the car to Chevrolet to sell. Corporate executives decided to enter the small car market and develop the vehicle.
In 1968, GM chairman James Roche announced GM would produce the new car in the U.S. in two years. Ed Cole was chief engineer and Bill Mitchell, vice-president of design staff, was the chief stylist. Cole wanted a world-beater in showrooms in 24 months. Roche noted that GM had a team of "stylists, researchers and engineers" who had worked on the vehicle code-named XP-877 for years. John DeLorean later challenged this notion and stated that no prototypes or test properties had been built before Roche's announcement. Blueprints apparently did exist; however, they were an amalgam of competitive subcompact vehicles from overseas, including some that GM overseas operations produced.
A GM design team was set up, headed by James G. Musser Jr., who had helped develop the Chevy II, the Camaro, the Chevrolet small-block V8 engines, and the Turbo-Hydramatic transmission. Musser said, "This was the first vehicle where one person was in charge", and that his team "did the entire vehicle".
Development: 1968–1970
Development for the new car began in 1968 to be powered by a new all-aluminum die-cast engine block technology. The first sand-cast aluminum blocks had preceded the decision to build the car by two years. It was a relatively large displacement engine with good low-speed torque, with gear ratios for low engine rpm to achieve fuel economy. Engine testing totaled 6,000,000 miles. A pre-test engine was installed in a Fiat 124 sedan for development of the aluminum block, while several 1968 Opel sedans were used for drivetrain development
Chevrolet instituted a new management program, the car line management technique, to produce the all-new car in two years. The chief vehicle engineer had overall charge of the program. Fifty engineers, dedicated to the design of the entire car, were divided into groups: body, power train, chassis design, product assurance, and pleasability. The latter would check continuously on the vehicles on the assembly line, with computers in another program monitoring the quality control of every vehicle built. Fisher Body engineers and draftsmen moved in with the Vega personnel.
In October 1968, there was one body style (the "11" style notchback sedan), one engine, one transmission (MB1 Torque-Drive manually shifted two-speed automatic), one base trim level, a bench seat, molded rubber floor covering, no glove box or headliner and no air-conditioning (ventilation was through the upper dash from the wiper plenum). As the market changed, so did the car in development.
In December 1968, hatchback, wagon, and panel delivery styles were added; also floor-level ventilation, and an optional performance engine ("L11" two-barrel) which, predicted as 20% of production, accounted for 75%. Bucket seats were standard. Hatchback and wagon received carpeting and headliners. Optional air conditioning, predicted as 10% of production, was actually selected 45% of the time.
In February 1969, Opel three- and four-speed transmissions (three-speed standard, others optional); Powerglide were added (now four transmissions); mechanical fuel pump replaced by in-tank electric pump (making this the first GM product with an in tank fuel pump prior to the adoption of fuel injection); power steering option; base "11" style notchback trim upgraded to match hatchback and wagon carpet and headliner.
In April 1969, the car gained gauge-pack cluster, HD suspension, wider tires; adjustable seat back (45% of production); bumpers restyled, lower valance panels added; swing-out quarter window option (10% of production).
In July 1969, an electrically heated rear window option (10% of production); "GT" package, $325.00 extra (35% of production); bright window-frame and roof drip moldings added to hatchback and wagon.
This is essentially how the car launched as a 1971 model. Production began on June 26, 1970. After the national GM strike (September to November 1970), bright roof drip moldings were added to the base "11" notchback, with moldings sent to dealers to update units already in the field.
Cars magazine said in 1974 that in the rush to introduce the car with other 1971 models, "[t]ests which should have been at the proving grounds were performed by customers, necessitating numerous piecemeal 'fixes' by dealers. Chevrolet's 'bright star' received an enduring black eye despite a continuing development program which eventually alleviated most of these initial shortcomings."
Design and engineering
The wheelbase on all models is . Width is . The 1971 and 1972 models are long. The 1973 models are longer due to the front 5 mph bumper. Front and rear 5 mph bumpers on 1974 to 1977 models add another .
The hatchback, with its lower roofline and a fold-down rear seat, accounted for nearly half of all Vegas sold.
The sedan, later named "Notchback", is the only model with an enclosed trunk, and had the lowest base price.1973 Chevrolet Vega brochure The Kammback wagon has a lower cargo liftover height and a swing-up liftgate.
The panel express had steel panels in place of the wagon's rear side glass, an enclosed storage area under the load floor, and a low-back driver's seat. An auxiliary passenger seat was optional.1971 Chevrolet Trucks full-line brochure. The model's classification as a truck, with less stringent safety requirements, allowed the low back seat(s).
The aluminum-block, inline-four engine was a joint effort by General Motors, Reynolds Metals, and Sealed Power Corp. The engine and its die-cast block technology were developed by GM engineering staff, then passed to Chevrolet for finalization and production. Ed Cole, involved with the 1955 small-block V8 as chief engineer at Chevrolet and now equally involved with the Vega engine as GM president, often visited the engineering staff engine drafting room on Saturdays, reviewing the design and directing changes, to the consternation of Chevrolet engineers and manufacturing personnel, who knew he wanted a rush job. Cole insisted that the engine didn't require a radiator - the heat rejection from the heater core would be sufficient. After many prototype failures, a (small) radiator was added to the vehicle. The engine in development became known in-house as "the world's tallest, smallest engine" due to the tall cylinder head. Its vibration, noise, and tendency to overheat were rectified by 1974.
The Vega's suspension, live rear axle, 53.2% front/46.8% rear weight distribution, low center of mass and neutral steering gave good handling. Lateral acceleration capacities were 0.90 g (standard suspension) and 0.93 g (RPO F-41 suspension). Steering box and linkage were ahead of the front wheel centerline, with a cushioned two-piece shaft. Front suspension was by short and long arms, with lower control arm bushings larger than on the 1970 Camaro.Chevrolet Vega engineering report – 1970 Four-link rear suspension copies the 1970 Chevelle. The design features coil springs front and rear.
The chassis development engineers aimed for full-size American car ride qualities with European handling. Later torque-arm rear suspension eliminated rear wheel hop under panic braking. Brakes (front discs, rear drums) copy an Opel design, with diameter single-piston solid rotors, drums and 70/30 front/rear braking distribution.
All models shared the same hood, fenders, floor pan, lower door panels, rocker panels, engine compartment and front end. In mid-1971, Chevrolet introduced an optional GT package for hatchback and Kammback models, which included the RPO L11 two-barrel 140 engine, F41 handling option, special tires, and trim.
Model year changes For 1972, models had a revised exhaust system and driveline to reduce vibration and noise; also revised shock absorbers. Turbo Hydra-Matic three-speed automatic transmission and custom cloth interior were optional and a glove box was added.1972 Chevrolet Vega brochure.
For 1973, 300 changes included new exterior and interior colors and new standard interior trim. Front and rear nameplate scripts "Chevrolet Vega 2300" were changed to "Vega by Chevrolet". To meet the 1973 5 mph front bumper standards the front bumper, on stronger brackets, was extended , with a steel body-color filler panel. US-built Saginaw manual transmissions and a new shift linkage replaced the Opel units. The RPO L11 engine had a new Holley 5210C progressive two-barrel carburetor. New options included BR70-13 white-stripe steel-belted radial tires, full wheel covers, and body side molding with black rubber insert. Two new models were introduced mid-year: the estate wagon with simulated wood grain side and rear accents, and the LX notchback with vinyl roof finish. On May 17, 1973, the millionth Vega left the Lordstown Assembly plant – an orange GT hatchback with white sport stripes, power steering, and neutral custom vinyl interior including exclusive vinyl door panels. A limited-edition "Millionth Vega" was introduced replicating the milestone car, with orange carpeting and Millionth Vega door handle accents. Sixty-five hundred were built from May 1 to July 1. For the first time, cloth upholstery was offered, with the Custom interior in black or blue.Chevrolet press release, May 17, 1973.