The 1981 Bentley Mulsanne has 29 ignition parts with verified fitment on this page — 4 part types and 12 brands, covering the 6.8L V8 engine. Each part includes a manufacturer part number and application notes.
The ignition system on the 1981 Bentley Mulsanne delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules. The largest groups are Ignition Coil (16 parts), Spark Plug (11 parts) and Distributor Cap (1 part). The other 1 part type covers the remaining 1 part.
The 1981 Bentley Mulsanne came with a single engine, the 6.8L V8, and every part is verified against it.
12 brands supply ignition parts for the 1981 Bentley Mulsanne, led by STANDARD MOTOR PRODUCTS (5 parts), NGK (5 parts) and CHAMPION (4 parts), plus 9 more brands. Quality grades include Standard Replacement, Economy and Copper / Nickel.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1981 Bentley Mulsanne. 7 parts have it, including SPECTRA PREMIUM C632 (Ignition Coil) and ACDELCO R44XLS (Spark Plug). Each part number opens a page with every vehicle that part fits.
Distributor Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | LU433 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Distributor caps. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable.
One part is listed for the 1981 Bentley Mulsanne — STANDARD MOTOR PRODUCTS LU433.
Distributor Rotor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | LU325 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Distributor rotors. Typical signs include shudder under braking, or a lip at the outer edge. Do not put new pads on a rotor that is below minimum thickness.
One part is listed for the 1981 Bentley Mulsanne — STANDARD MOTOR PRODUCTS LU325.
Ignition Coil
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SPECTRA PREMIUM Popular | C632 | 🇺🇸 US 🇨🇦 CA | Packwith External Resistor | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular | UC15T | 🇺🇸 US 🇨🇦 CA | T-Series | View on Amazon |
| FVP | UC15F | 🇺🇸 US 🇨🇦 CA | Internal Resistor Coil | View on Amazon |
| HOLSTEIN | 2IGC0058 | 🇺🇸 US 🇨🇦 CA | with internal resistor | View on Amazon |
| HOLSTEIN | 2IGC0146 | 🇺🇸 US 🇨🇦 CA | with External Resistor | View on Amazon |
| SKP | SKUC15T | 🇺🇸 US 🇨🇦 CA | Fits Coil Packor with internal resistor | View on Amazon |
| SPECTRA PREMIUM | C622 | 🇺🇸 US 🇨🇦 CA | PackInternal Resistor Coil | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK Popular | 48863 | 🇺🇸 US 🇨🇦 CA | Internal Resistor CoilConnections May be Eyelet or Spade | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular | UC15 | 🇺🇸 US 🇨🇦 CA | Internal Resistor Coil | View on Amazon |
| STANDARD MOTOR PRODUCTS | UF2 | 🇺🇸 US 🇨🇦 CA | with External Resistor | View on Amazon |
| UNITED MOTOR PRODUCTS | C2 | 🇺🇸 US 🇨🇦 CA | with External Resistor | View on Amazon |
| UNITED MOTOR PRODUCTS | C15 | 🇺🇸 US 🇨🇦 CA | Internal Resistor Coil | View on Amazon |
| WALKER PRODUCTS | 9201041 | 🇺🇸 US 🇨🇦 CA | Single Coil | View on Amazon |
| WALKER PRODUCTS | 9201017 | 🇺🇸 US 🇨🇦 CA | Single Coil | View on Amazon |
| WELLS | 5C1057 | 🇺🇸 US 🇨🇦 CA | Requires External Resistor: YES | View on Amazon |
| WELLS | 5C1019 | 🇺🇸 US 🇨🇦 CA | Used on most import products with 12 Volt system with Internal resistorUniversal 12 Volt Coil | View on Amazon |
This table covers the coils that fire each spark plug. Typical signs include a misfire that follows one cylinder, a snap in damp weather, or a coil that is swollen or cracked. Swap a suspect coil with a neighbor to confirm, then replace boots that tore on the way off.
16 Ignition Coil parts for the 1981 Bentley Mulsanne come from 9 brands — STANDARD MOTOR PRODUCTS, SPECTRA PREMIUM, HOLSTEIN and 6 other brands. The "Popular" part is SPECTRA PREMIUM C632.
The Economy section lists 7 options from SPECTRA PREMIUM, HOLSTEIN, STANDARD MOTOR PRODUCTS and 2 other brands — the catalog's value-priced group. SPECTRA PREMIUM C632 is listed in this group.
In the Standard Replacement grade, STANDARD MOTOR PRODUCTS, UNITED MOTOR PRODUCTS, WALKER PRODUCTS and 2 other brands supply 9 parts: built to original-equipment specification. A representative part number is NGK 48863.
Spark Plug
Summary: Notes include pre-set gaps of 0.031", 0.032", 0.033", 0.035", 0.039" and 0.040". Replacement brands in this table include CHAMPION, NGK and ACDELCO.
Copper / Nickel
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular | R44XLS | 🇺🇸 US 🇨🇦 CA | ProfessionalConventional | View on Amazon |
| CHAMPION Popular | 404 | 🇺🇸 US 🇨🇦 CA | Copper PlusPre-Set Gap: 0.035" | View on Amazon |
| NGK Popular | 6578 | 🇺🇸 US 🇨🇦 CA | StandardPre-Set Gap: 0.032" | View on Amazon |
| BOSCH | 7911 | 🇺🇸 US 🇨🇦 CA | NickelPre-Set Gap: 0.031" | View on Amazon |
| CHAMPION | 4041 | 🇺🇸 US 🇨🇦 CA | Copper PlusClassification: Champion Copper Plus | View on Amazon |
| NGK | 2635 | 🇺🇸 US 🇨🇦 CA | V-PowerPre-Set Gap: 0.040" | View on Amazon |
Double Platinum (lasts up to 3x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | 41828 | 🇺🇸 US 🇨🇦 CA | ProfessionalDouble Platinum | View on Amazon |
| CHAMPION | 7322 | 🇺🇸 US 🇨🇦 CA | Double Platinum PowerPre-Set Gap: 0.032" | View on Amazon |
Iridium (lasts up to 4x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK | 97382 | 🇺🇸 US 🇨🇦 CA | Iridium IXPre-Set Gap: 0.040" | View on Amazon |
Platinum (lasts up to 2x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CHAMPION | 3405 | 🇺🇸 US 🇨🇦 CA | Platinum PowerPlug Type: RN14PMC | View on Amazon |
| NGK | 2763 | 🇺🇸 US 🇨🇦 CA | G-PowerPre-Set Gap: 0.040" | View on Amazon |
This table covers the spark plugs for this engine. Typical signs include misfire under load, rough idle, or a flashing check-engine light. Verify the gap even on pre-gapped plugs, and replace coil boots that come off a high-mileage engine.
11 Spark Plug parts are listed for the 1981 Bentley Mulsanne, from CHAMPION, NGK, ACDELCO and 1 other brand. ACDELCO R44XLS carries the "Popular" badge.
In the Copper / Nickel grade, CHAMPION, NGK, ACDELCO and 1 other brand supply 6 parts: grouped under the catalog's "Copper / Nickel" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO R44XLS.
In the Double Platinum (lasts up to 3x longer than Copper / Nickel) grade, ACDELCO and CHAMPION supply 2 parts: grouped under the catalog's "Double Platinum (lasts up to 3x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO 41828.
The Iridium (lasts up to 4x longer than Copper / Nickel) section lists 1 option from NGK — grouped under the catalog's "Iridium (lasts up to 4x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. NGK 97382 is listed in this group.
In the Platinum (lasts up to 2x longer than Copper / Nickel) grade, CHAMPION and NGK supply 2 parts: grouped under the catalog's "Platinum (lasts up to 2x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. A representative part number is CHAMPION 3405.
Buying Ignition Parts for a 1981 Bentley Mulsanne
On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
- Confirm you have the 6.8L V8 engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Ignition Coil and Spark Plug .
Frequently Asked Questions
How many ignition parts fit the 1981 Bentley Mulsanne?
Our catalog currently lists 29 ignition parts for the 1981 Bentley Mulsanne across 4 subcategories and 12 brands, covering the 6.8L V8 engine. Each part is matched to the engine(s) it fits.
What are the signs of ignition problems on a 1981 Bentley Mulsanne?
Common symptoms include misfires under load, rough idle, flashing check-engine light, or poor starting in damp weather. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What spark-plug gap is listed for the 1981 Bentley Mulsanne?
Notes on this page include pre-set gaps of 0.031", 0.032", 0.033", 0.035", 0.039" and 0.040". Still verify against spec — even “pre-gapped” plugs should be checked before they go in.
What should I replace at the same time?
Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 1981 Bentley Mulsanne was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 1981 Bentley Mulsanne?
Every part on this page is matched to the 6.8L V8 engine. Then gap matters even on “pre-gapped” plugs — verify against spec, and replace coil boots when they come off a high-mileage engine. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1981 Bentley Mulsanne
Ignition Parts for Other Bentley Mulsanne Years
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