1984 Rolls-Royce Silver Spirit/Spur/Mulsanne: MPG and fuel economy
The 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne is rated by the U.S. Environmental Protection Agency at 9 combined MPG, with 8 MPG in the city and 10 MPG on the highway. That lands well below the average for cars in the Midsize Cars class in the same model year.
This page collects every fuel-economy figure the EPA publishes for the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne. Below you will find the headline combined, city, and highway MPG, the estimated annual fuel cost at three different driving levels, the tailpipe CO₂ emissions, and a full breakdown of the engine and drivetrain. The EPA rates 2 separate variants of this car (different engine, transmission, or drivetrain combinations), and you can compare them side by side in the trims table. If you want to know whether this generation got more or less efficient over the years, the year-over-year table further down covers every model year the EPA has rated.
Key takeaways
- Returns 52% worse combined MPG than the average car in the Midsize Cars class for the 1984 model year (18.6 MPG class average).
- The most efficient car in the Midsize Cars class for the 1984 model year is the Buick Century at 23 MPG.
- EPA estimates this car costs around $22,500 more in fuel over five years than an average new vehicle of the same model year.
- Subject to the federal Gas Guzzler Tax, which applies to passenger cars rated below 22.5 combined MPG.
Fuel economy at a glance
These are the EPA's official ratings for the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne. The numbers come from a standardised laboratory test cycle and are the same figures that appear on the window sticker of every new car. Real-world mileage varies with driving style, weather, fuel quality, and how heavily loaded the car is.
When the EPA tests several variants of the same nameplate (for example, a front-wheel-drive version and an all-wheel-drive version), each gets its own rating. The figures shown here are the headline variant, taken as the configuration with the best combined MPG. The trims table further down covers all 2 variants side by side.
Combined MPG is a 55/45 weighted blend of the city and highway test cycles. The EPA uses it as the single number you can compare across the entire dataset, including hybrids and EVs (which use the equivalent MPGe figure).
| Combined MPG | 9 MPG |
| City MPG | 8 MPG |
| Highway MPG | 10 MPG |
| Annual fuel cost | $6,650 |
| Tailpipe CO₂ | 987 g/mi |
| Fuel type | Regular |
How the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne compares
The 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne returns 9 combined MPG. Cars in the Midsize Cars class for the same model year average 18.6 MPG, which puts this car behind the class average by about 52%.
The most efficient car in the Midsize Cars class for the 1984 model year is the Buick Century at 23 MPG. The bar chart below puts the Rolls-Royce Silver Spirit/Spur/Mulsanne alongside the class best and the class average so you can see the full picture.
For broader context, the average new car of the 1984 model year (across all classes) returns 19.2 MPG. Larger vehicles pull the all-cars average down, so do not use that figure on its own to judge a small car or a hybrid. The full list of the most efficient cars of the 1984 model year is on its own page.
Trim variants rated for 1984
The EPA rates 2 separate variants of the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne. The differences come from the engine size, transmission type, and drivetrain (front-wheel drive, all-wheel drive, and so on). The same nameplate can land several MPG apart depending on the configuration you actually buy.
| Engine and transmission | Drive | Combined | City | Highway | Annual cost |
|---|---|---|---|---|---|
| 6.8L, 8-cyl, Automatic 3-spd | — | 9 MPG | 8 MPG | 10 MPG | $6,650 |
| 6.8L, 8-cyl, Automatic 3-spd | — | 9 MPG | 8 MPG | 10 MPG | $6,650 |
Annual fuel cost across driving patterns
The headline annual fuel cost the EPA publishes assumes 15,000 miles of driving per year and a fuel mix of 55% city and 45% highway. The dollar figure is calculated using the EPA's current reference price for regular gasoline, which is $3.99/gallon. EPA updates that reference periodically rather than tracking live pump prices, so treat it as a window-sticker estimate rather than today's pump number.
The table below scales the EPA's number to three common driving patterns. The combined MPG and the reference fuel price stay constant, only the annual mileage changes. To get a current-prices estimate, take your local gas price and multiply by 1666.7 gallons (the car's annual consumption at the rated MPG).
| Driving pattern | Estimated annual fuel cost |
|---|---|
| Light driver, 7,500 miles per year | $3,325 |
| Average driver, 15,000 miles per year | $6,650 |
| Heavy driver, 25,000 miles per year | $11,083 |
Year-over-year MPG for the Rolls-Royce Silver Spirit/Spur/Mulsanne
The EPA has rated the Rolls-Royce Silver Spirit/Spur/Mulsanne across 3 model years, from 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne through 1986 Rolls-Royce Silver Spirit/Spur/Mulsanne. The numbers below are the best combined MPG figure the EPA published for each year, which lets you see when the car was at its most efficient and how recent generations stack up.
Combined MPG has stayed in roughly the same range across the run, hovering close to 9 MPG.
| Year | Combined MPG | Open year page |
|---|---|---|
| 1986 | 9 MPG | 1986 Rolls-Royce Silver Spirit/Spur/Mulsanne |
| 1985 | 9 MPG | 1985 Rolls-Royce Silver Spirit/Spur/Mulsanne |
| 1984 | 9 MPG | this page |
Compare against other Midsize Cars for 1984
If you are cross-shopping the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne, the most useful comparison is against the other cars in the Midsize Cars class for the same model year. The list below shows the highest-MPG peers, ranked from most to least efficient. Click any of them to open its full page.
The Buick Century leads this group at 25 MPG, 16 MPG ahead of the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne.
Specifications
The 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne runs a 6.8-liter 8-cylinder engine paired with a automatic 3-spd.
Engine, transmission, and drivetrain together drive most of the variation in fuel economy across trims. A larger engine moves the car with less effort but burns more fuel. A turbo lets a small engine punch above its weight, often without much MPG penalty. All-wheel drive adds traction and weight, and usually costs a couple of MPG compared with two-wheel drive of the same engine.
- Vehicle class
- Midsize Cars
- Engine
- 6.8L 8-cylinder
- Transmission
- Automatic 3-spd
- Fuel type
- Regular
- Annual petroleum use
- 33.1 barrels per year
- Gas guzzler tax
- Applies (federal)
Common questions about the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne
Quick answers to the questions people most often search for when looking up the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne.
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Is the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne fuel efficient?
Not particularly. The 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne returns 9 combined MPG, which trails the average car in the Midsize Cars class for the same model year by about 52%. -
What MPG does the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne get?
The EPA rates the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne at 9 combined MPG, 8 MPG in city driving, and 10 MPG on the highway. Real-world numbers depend on your driving style, the weather, and how loaded the car is. -
How much does it cost to fuel a 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne per year?
The EPA estimates an annual fuel cost of $6,650 for the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne. That figure assumes 15,000 miles of driving per year, a 55% city and 45% highway split, and the EPA's published average fuel price for the rated fuel grade. -
What fuel does the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne use?
The EPA lists the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne as running on regular gasoline. Using a different grade than the manufacturer specifies can affect fuel economy and engine longevity. -
Has the Rolls-Royce Silver Spirit/Spur/Mulsanne become more fuel efficient over time?
Combined MPG has stayed close to flat across the run. Both the earliest (1984 Rolls-Royce Silver Spirit/Spur/Mulsanne, 9 MPG) and most recent (1986 Rolls-Royce Silver Spirit/Spur/Mulsanne, 9 MPG) versions sit in the same range. -
How much CO₂ does the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne emit?
Tailpipe CO₂ emissions are 987 g/mi. Multiplied across a typical year of driving (15,000 miles) that works out to about 14,812 kilograms of CO₂. -
What is the difference between the city and highway MPG of the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne?
City driving returns 8 MPG and highway driving returns 10 MPG, a gap of 2 MPG. The two figures are close enough that the car will hold its rated efficiency well across most driving patterns. -
What engine is in the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne?
The 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne has a 6.8-liter 8-cylinder engine (EPA description: (GUZZLER)). -
What transmission and drivetrain does the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne have?
The 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne comes with a automatic 3-spd transmission. -
How does the 1984 Rolls-Royce Silver Spirit/Spur/Mulsanne compare to the best car in its class?
The most efficient car in the Midsize Cars class for the 1984 model year is the Buick Century at 23 combined MPG. The Rolls-Royce Silver Spirit/Spur/Mulsanne returns 9 MPG, a gap of 14 MPG. If you are comparing on fuel economy alone, the class leader is worth a look.
Source: U.S. EPA fuel economy dataset. Annual fuel cost figures assume 15,000 miles of driving per year and a 55% city, 45% highway split. Real-world mileage varies with driving conditions, vehicle maintenance, fuel quality, and driver behaviour.