The 1956 Alvis TC21 has 11 ignition parts with verified fitment on this page — 2 part types and 10 brands, covering the 3.0L L6 engine. Each part includes a manufacturer part number and application notes.
On the 1956 Alvis TC21, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules. All 11 listed parts are Ignition Coil (8 parts) and Spark Plug (3 parts).
Every part on this page is matched to the 3.0L L6 — the only engine offered in the 1956 Alvis TC21.
The most listed brands for 1956 Alvis TC21 ignition parts are STANDARD MOTOR PRODUCTS (2 parts), FVP (1 part) and HOLSTEIN (1 part), plus 7 more brands. Quality grades include Economy and Standard Replacement.
2 parts on this 1956 Alvis TC21 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including STANDARD MOTOR PRODUCTS UC15T (Ignition Coil) and STANDARD MOTOR PRODUCTS UC15 (Ignition Coil). Click any part number to see every vehicle that part fits.
Ignition Coil
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | UC15T | 🇺🇸 US | T-Series | View on Amazon |
| FVP | UC15F | 🇺🇸 US | View on Amazon | |
| HOLSTEIN | 2IGC0058 | 🇺🇸 US | View on Amazon | |
| SKP | SKUC15T | 🇺🇸 US | Coil Pack | View on Amazon |
| SPECTRA PREMIUM | C622 | 🇺🇸 US | PackInternal Resistor Coil | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | UC15 | 🇺🇸 US | View on Amazon | |
| UNITED MOTOR PRODUCTS | C15 | 🇺🇸 US | View on Amazon | |
| WELLS | 5C1019 | 🇺🇸 US | 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.
8 Ignition Coil parts are listed for the 1956 Alvis TC21, from STANDARD MOTOR PRODUCTS, FVP, HOLSTEIN and 4 other brands. STANDARD MOTOR PRODUCTS UC15T carries the "Popular" badge.
In the Economy grade, STANDARD MOTOR PRODUCTS, FVP, HOLSTEIN and 2 other brands supply 5 parts: the catalog's value-priced group. A representative part number is STANDARD MOTOR PRODUCTS UC15T.
The Standard Replacement section lists 3 options from STANDARD MOTOR PRODUCTS, UNITED MOTOR PRODUCTS and WELLS — built to original-equipment specification. STANDARD MOTOR PRODUCTS UC15 is listed in this group.
Listed part numbers: STANDARD MOTOR PRODUCTS UC15T, FVP UC15F and HOLSTEIN 2IGC0058, plus the other parts above.
Spark Plug
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | R44F | 🇺🇸 US 🇨🇦 CA | ProfessionalConventional | View on Amazon |
| AUTOLITE | 425 | 🇺🇸 US | Center Electrode Projection: Short ProjectionCopper Resistor | View on Amazon |
| CHAMPION | 896 | 🇺🇸 US | Copper Plus | 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.
3 Spark Plug parts for the 1956 Alvis TC21 come from 3 brands — ACDELCO, AUTOLITE and CHAMPION.
Listed part numbers: ACDELCO R44F, AUTOLITE 425 and CHAMPION 896.
Buying Ignition Parts for a 1956 Alvis TC21
On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
- Confirm you have the 3.0L L6 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 1956 Alvis TC21?
Our catalog currently lists 11 ignition parts for the 1956 Alvis TC21 across 2 subcategories and 10 brands, covering the 3.0L L6 engine. Each part is matched to the engine(s) it fits.
What are the signs of ignition problems on a 1956 Alvis TC21?
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 1956 Alvis TC21?
Notes on this page include pre-set gaps of 0.025" and 0.030". 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 1956 Alvis TC21 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 1956 Alvis TC21?
Every part on this page is matched to the 3.0L L6 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 1956 Alvis TC21
Ignition Parts for Other Alvis TC21 Years
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