NGK PJR7A 2842 Spark Plug

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Rating
Brand	Code
3.8 / 5 Overall
NGK	PJR7A
4.0 / 5 Materials
Platinum	Platinum
Ground electrode	Center electrode
3.5 / 5 Design
Standard	Fine Wire
Ground type	Center type

Specifications
Gap	Heat range
0.7mm (.028")	7
⌀12mm	1.25mm
Thread diameter	Thread pitch
19mm (3/4")	18mm ()
Reach	Hex size
Gasket	Threaded Stud
Seat	Terminal
1	Non-Projected
Ground count	Projection

Cross-reference and alternatives

How we find alternative spark plugs How we rate spark plugs

Cross-reference (3)

Alternative spark plugs found in cross-reference docs provided by manufacturers

IX22B

Copper-Iridium

4.3/ 5

.035"19mm, ⌀12x1.25HR 22

RA8PHP

Platinum

3.6/ 5

.039"19mm, ⌀12x1.25HR 8

4132

Copper

2.9/ 5

.028"19mm, ⌀12x1.25HR 1

Deep reference (31)

A second level of cross-reference: if A=B and B=C, then A=C

IX24

Copper-Iridium

4.3/ 5

.031"19mm, ⌀12x1.25HR 24

IX22

Copper-Iridium

4.3/ 5

.031"19mm, ⌀12x1.25HR 22

IX27

Copper-Iridium

4.3/ 5

.031"19mm, ⌀12x1.25HR 27

IJR7A9

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀12x1.25HR 7

IJR7A9

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀12x1.25HR 7

DPR7EIX-9

Copper-Iridium

3.8/ 5

.035"19mm, ⌀12x1.25HR 7

DR9EIX

Copper-Iridium

3.8/ 5

.031"19mm, ⌀12x1.25HR 9

XR2CS

Copper-Silver

3.3/ 5

.028"19mm, ⌀12x1.25HR 2

XR4CS

Copper-Silver

3.3/ 5

.028"19mm, ⌀12x1.25HR 4

X20ES-U

Copper

3.3/ 5

.028"19mm, ⌀12x1.25HR 20

X22ESR-U

Copper

3.3/ 5

.028"19mm, ⌀12x1.25HR 22

X22ES-U

Copper

3.3/ 5

.028"19mm, ⌀12x1.25HR 22

X24ESR-U

Copper

3.3/ 5

.028"19mm, ⌀12x1.25HR 24

X24ES-U

Copper

3.3/ 5

.028"19mm, ⌀12x1.25HR 24

X27ESR-U

Copper

3.3/ 5

.028"19mm, ⌀12x1.25HR 27

X27ES-U

Copper

3.3/ 5

.028"19mm, ⌀12x1.25HR 27

X27ETR

Copper

3.3/ 5

.028"19mm, ⌀12x1.25HR 27

JR8C

Copper

3.3/ 5

.028"19mm, ⌀12x1.25HR 8

JR9C

Copper

3.3/ 5

.028"19mm, ⌀12x1.25HR 9

DPR6EB-9

Copper

2.9/ 5

.035"19mm, ⌀12x1.25HR 6

D7EA

Copper

2.9/ 5

.028"19mm, ⌀12x1.25HR 7

D8EA

Copper

2.9/ 5

.028"19mm, ⌀12x1.25HR 8

D9EA

Copper

2.9/ 5

.028"19mm, ⌀12x1.25HR 9

DR7ES

Copper

2.9/ 5

.028"19mm, ⌀12x1.25HR 7

DR8EA

Copper

2.9/ 5

.028"19mm, ⌀12x1.25HR 8

DR8EB

Copper

2.9/ 5

.028"19mm, ⌀12x1.25HR 8

DR9EA

Copper

2.9/ 5

.028"19mm, ⌀12x1.25HR 9

J10A

Copper

2.9/ 5

.028"19mm, ⌀12x1.25HR 10

J9A

Copper

2.9/ 5

.028"19mm, ⌀12x1.25HR 9

JR10B

Copper

2.9/ 5

.028"19mm, ⌀12x1.25HR 10

JR9B

Copper

2.9/ 5

.028"19mm, ⌀12x1.25HR 9

Bigger gap (4)

0.1..0.3 mm gap increase for better performance given your ignition system can handle it

IJR7A9

Iridium-Platinum

4.2/ 5

.035"19mm, ⌀12x1.25HR 7

DPR7EIX-9

Copper-Iridium

3.8/ 5

.035"19mm, ⌀12x1.25HR 7

DPR7EA-9

Copper

2.9/ 5

.035"19mm, ⌀12x1.25HR 7

DPR7EA-9 BLYB

Copper

2.9/ 5

.035"19mm, ⌀12x1.25HR 7

One step colder (1)

Colder spark plugs with same characteristics for moderately tuned engines (75–100 hp increase)

DPR8Z

Copper

2.8/ 5

.028"19mm, ⌀12x1.25HR 8

Two steps colder (1)

Two steps colder spark plugs with same characteristics for heavily modified engines (150-200 hp increase)

DPR9Z

Copper

2.8/ 5

.028"19mm, ⌀12x1.25HR 9