The Cadillac Sixteen is a concept car developed and presented by Cadillac in 2003. Its centrepiece was a 13.6-litre aluminium V16, exclusive to the car and based on the GM Generation IV LS architecture, producing at least 1,000 hp without any form of forced induction.
Cadillac Sixteen at a glance
| Maker | Cadillac, General Motors |
|---|---|
| Shown | 2003 |
| Type | four-door luxury concept |
| Engine | 13.6 L (829 cu in) 32-valve aluminium V16 |
| Power | at least 1,000 hp (746 kW) |
| Torque | at least 1,000 lb-ft (1,356 Nm) |
| Transmission | four-speed electronically controlled automatic |
| Drive | rear-wheel drive |
| Fuel saving | displacement on demand, running on 12 or 8 cylinders |
| Economy | 16.65 mpg in normal conditions |
| Weight | about 5,005 lb (2,270 kg) |
| Reference | the Cadillac V-16 of the 1930s |
Based on one source: the English Wikipedia article on the Sixteen. The only free photographs available show the 1930s V-16 cars the concept referred to.
History of the Cadillac Sixteen
The Sixteen referenced Cadillac’s V-16 cars of the 1930s, but its design mixed the brand’s current Art and Science theme with cues from the 1967 Cadillac Eldorado, and further original elements came from an in-house competition led by GM vice president Bob Lutz. The car carried a Cadillac logo carved from solid crystal on the steering wheel and a Bulgari clock on the dashboard.
The engine
The V16 displaced 13.6 litres, or 829 cubic inches, with 32 valves and an aluminium block developed exclusively for the car on the GM Generation IV LS architecture. It drove the rear wheels through a four-speed electronically controlled automatic. Active Fuel Management, Cadillac’s displacement-on-demand technology, could shut down twelve or eight of the cylinders when full output was not needed, and the engine was rated at 16.65 mpg in normal conditions. Despite its size the car weighed about 5,005 pounds.
After the show
The Sixteen stayed a concept, but its design language appeared in later Cadillacs, most noticeably the 2008 CTS. Rumours of a limited production halo model never stopped: a smaller ULS or XLS with a V8 and an optional V12, to be called the Cadillac Twelve, was talked about from 2005 but shelved in favour of the XTS. A halo car descended from the Sixteen was finally confirmed in March 2020 as the Cadillac Celestiq, an electric ultra-luxury four-door that began production in 2024. The Sixteen also appeared on Top Gear with James May in 2003, in the films Click and Real Steel, and in the games Midnight Club 3 and Project Gotham Racing 4.
Design and features
- 13.6-litre V16: 32 valves, at least 1,000 hp and 1,000 lb-ft without forced induction.
- Displacement on demand: the engine could run on twelve or eight cylinders to save fuel.
- Crystal and Bulgari: a Cadillac crest carved from solid crystal and a Bulgari dashboard clock.
- Design legacy: its shapes passed to the 2008 CTS and pointed towards the Celestiq.
Cadillac Sixteen versions
- Sixteen concept (2003): the single show car.
- ULS/XLS project: the rumoured smaller production car with a V8 and optional V12, never built.
- Celestiq (2024): the electric flagship that finally followed the Sixteen’s idea.
The Sixteen looked back to the V-16 of the 1930s and forward to show cars such as the Ciel and Cien. More Cadillacs are in the Cadillac collection.
Video: 1,000 HP Cadillac Sixteen Startup, V16 engine
Video by DtRockstar1 on YouTube.
Sources
- Cadillac Sixteen, English Wikipedia: engine, design, production rumours, media
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