What number or letter in the VIN tells you if your have a 4.6L Windsor or Romeo?
Also, which one is suppose to be better?
Thanks

 

If you look on the Drivers side Valve cover it should say Windsor or Romeo on the Bar-Code sticker. At least mine does. If not, than do a search on VIN here on the website. Someone has posted it before I just cant remember who and when.

Hope this helps

------------------
97 Expy 4.6L, 2wd XLT
Airaid Intake
Rancho 5000
Superchip
Ravin Z-77 Exhaust
Raybestos Ceramic Brake Pads

Stereo Mods:
Infiniti Kappa 5 X 7 doors
JL Audio 10" sub (rear cargo area)
Alpine Flex5 amp (under pass. seat)

 

The eigth digit of your VIN denotes the engine. They are backwards to what one would think they should be.

W is a Romeo 4.6L
6 is a Windsor 4.6L

------------------
1997 4x4 Expedition- 4.6L, true dual exhaust w/Ravin DI/DO, K&N air filter, SuperChip, airbox mods, Edelbrock shocks, 285/75R16 BFG ATs, 2000 F150 "XLT" wheels, 4.10 gears, Auburn LS, Clarion In-dash CD player, Smitty Bilt push bars and nerf bars.

2001 4x4 F350 SD XLT CrewCab LWB- 6.8L, Offroad Pkg, HD Suspension Pkg, 3.73LS, TT mirrors, 6-disc CD changer, Remote Keyless Entry, Sliding back glass, tinted windows, GoRhino nerf bars.
NoMo's site

 

THANKS GUYS! I looked up some old posts as well and got educated.
I am the proud owner of a Windsor 4.6 which appears to be better built according to the posts I read. A little beefier. The only problem was piston slap and at 130,000 miles I don't have that problem.

------------------
1997 F150XLT 4X4 Supercab 4.6L Silver

 

I have had both engines and both engines are as good as the other. The Windsor has floating piston pins and the Romeo has a fixed pin and a smaller connecting rod. The trade off is a stronger rod vs a lighter recopricating mass and an ability to rev quicker. Ponder this; the 5.4 has a floating pin and engine knock.

Regards

Jean Marc Chartier

------------------
00 F-150 XLT SC Flairside 4x4 4.6 w/5spd 3.55LSD
Warn XD9000i, skid plates, Draw tite class III,
Rancho RSX Reflex shocks, MAC 8.8 Axle Girdle
BFG 285/75 R16 MTs,
Borla Cat Back, Hedman Headers,
Custom air intake system with modified
air box, Ported Throttle body,
Shortened MAF sensor tower,
K&N air filter,
Superchips

 

goto this website. This website is SUPER SUPER good. tells EVERYTHING you need to know about your vehicle...I mean everything, and its FREE...

https://www.vindecoderz.com/EN/car-s...ance-equipment