Oldsmobile Omega

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Oldsmobile Omega
Oldsmobile Omega sedan 2 -- 09-03-2010.jpg
Overview
Manufacturer General Motors
Production 1973–1984
Body and chassis
Class Compact
Platform X-body
Chronology
Successor Oldsmobile Cutlass Calais

The Oldsmobile Omega was a compact car sold from 1973 through 1984 by the Oldsmobile division of General Motors. The name omega was used to imply the last, the end, or the ultimate limit of a set, in contrast to Alpha, the first letter of the Greek alphabet. There were two generations of Omegas, both badge engineered on Chevrolet models, and both using the GM X platform architecture:


1973–1974[edit]

First generation
1973 Oldsmobile Omega.JPG
Overview
Production 1973–1974
Body and chassis
Body style 2-door coupe
3-door hatchback
4-door sedan
Layout FR layout
Related Chevrolet Nova
Pontiac Ventura
Buick Apollo
Dimensions
Wheelbase 111 in (2,819.4 mm)

The Omega was one of 3 X-body Chevrolet Nova clones introduced in 1973 (the Buick Apollo being the other one; the Pontiac Ventura was introduced in 1971). Naturally it shared the Nova's body and many of its mechanicals, but it had its own unique nose and tail, and, being an Oldsmobile, it had a little fancier trim than the Nova. It even borrowed the Nova's dashboard, but Olds added woodgrain trim to it for a more upscale look.

The front grille sported Oldsmobile's trademark split "waterfall" grille design, round headlights set into square recesses, and parking lights directly below in the bumper. Body styles mirrored that of the Nova, starting with a 2-door coupe, 3-door hatchback or a 4-door sedan.

1973 Oldsmobile Omega Brougham

Engine choices were the standard Chevy-built 4.1L (250 cid) I6 with a 3-speed manual transmission standard, with a 4-speed manual or a 2- or 3-speed automatic optional. The lone V8 option was Oldsmobile's 5.7L (350 cid) "Rocket" V8, which had a 4-speed manual as standard with the 3-speed automatic optional. V8 models with the eight VIN digit being the letter "K" received a 4-barrel rochester carburetor. All other V8 engines received the standard 2-barrel version.

Models were base and upper-level Brougham. Not many changes at all in 1974 other than the 2-speed Powerglide transmission being dumped, the parking lights being relocated inboard below the grille instead of the headlights and a new rear bumper design which met the federal government's new 5-mph impact standards. There would be an all-new Omega in 1975.

1975–1979[edit]

Second generation
OldsmobileOmegaX.jpg
Overview
Production 1975–1979
Body and chassis
Body style 2-door coupe
3-door hatchback
4-door sedan
Layout FR layout
Related Chevrolet Nova
Pontiac Ventura
Buick Apollo
Buick Skylark
Pontiac Phoenix
Powertrain
Engine 250 cu in I6
260 cu in V8
350 cu in V8
Dimensions
Wheelbase 111 in (2,819.4 mm)

This car was the top of the X-body line along with Buick's Apollo and Skylark, having more luxury trimming, more noise insulation, rear anti-roll bars, and other features not found on the Chevrolet Nova.

During the 1975-76 model years, the top engine choice was a 350 cu. in. (5.7 Liter) V8 from GM's Buick division. During that time, the base engine was the 115 hp (86 kW) 250 cu. in. (4.1 Liter) inline-6 from Chevrolet, until 1977 when it was dropped in favor of the lighter 110 hp (82 kW) Buick 231 V6 . It saw few changes through its life being limited mostly to the front end (3 different grilles) and to the rear lights, changing the number of lenses through the years. The Oldsmobile 260 V8 (4.3 Liter) was available as an option from 1975-79.

1980–1984[edit]

Third generation
'80 Oldsmobile Omega Sedan.jpg
Overview
Production 1979–1984
Model years 1980-1984
Body and chassis
Body style 2-door coupe
4-door sedan
Layout Transverse front-engine, front-wheel drive
Platform X-body
Related Chevrolet Citation
Buick Skylark
Pontiac Phoenix
Powertrain
Engine 2.5 L Iron Duke I4
2.8 L LE2 V6
2.8 L LH7 V6
Transmission 4-speed manual
3-speed GM TH-125C automatic
Dimensions
Wheelbase 105 in (2,667 mm)
Length 181.8 in (4,618 mm)
Width 69.8 in (1,773 mm)
Height 53.7 in (1,365 mm)

The X-bodies were all-new front-wheel drive cars for 1980. Engine choices were now limited to Pontiac's Iron Duke inline-four engine and the new corporate 2.8 L LE2 V6 designed specifically for this platform.

Unlike the Chevrolet Citation, which the car was based upon, the Omega range consisted of a 2-door coupe and 4-door sedan, with upright styling and a distinctive split grille.

Aside from the standard and brougham models produced in all five years, sportier models were also built. These included the SX coupe (replaced by the ES in 1982), ES sedan, and pioneering plastic-fendered SportOmega, which came with wild red-and-orange striping, white-over-gray paint, and a sloping front grille assembly shared with the SX and ES.

Beginning in 1982, the Chevrolet high-output (130 horsepower) 2.8L V6 became available on ES models.

The X-body Omega, like its sister vehicles (the Chevrolet Citation, Pontiac Phoenix and Buick Skylark, proved fairly trouble-prone early on, necessitating an astounding number of government-mandated recalls for braking problems, fluid leaks and suspension issues. While Omega was the only one of the four X-cars to sell better in 1981 than in 1980 (147,918 versus 134,323), starting in 1982, production fell dramatically. Only 77,469 Omegas were built in '82, with 53,926 in 1983 and 52,986 in swan-song 1984.

For 1985, the Omega was replaced by the N-body Calais.