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Stag Engine Vs Rover Engine

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    Stag Engine Vs Rover Engine

    Dear All, I am about to bite the bullet and remove the trusted rover engine which has never failed me since i purchased the car with it in 1989.... even after 4 years sitting outside, charge the battery and crank it over a few times and it is running....for a rebuilt stag engine, (being rebuilt by a local chap in Ipswich) I am nervous about the switch the current rover engine has been dependable and would have no hesitation driving around Europe. Next year I will be driving to Romania via the Transfagarasan highway (Top gears Best Road in the World) I would like to hear how many stag V8 owners use their cars for long journeys regularly, how reliable they have found them to be and anything I should consider....as always thanks for taking the time to read and reply...all the best vish
    Last edited by Vishnu; 16th May 2018, 15:58.

    #2
    I would put back a Stag engine. Stags with Rover, Ford V6, Triumph 6 cylinder or any other non Stag engine will not be able to keep there historic status and may be forced to have a Q number plate.

    https://www.duckhams.com/important-c...hicle-history/
    Last edited by tonyh; 16th May 2018, 16:42.

    Comment


      #3
      not sure about that one TonyH

      DVLA dont seem to have a clue but the points system which would have traditionally identified a radically altered vehicle is still in place

      https://www.gov.uk/vehicle-registrat...tered-vehicles
      Keep the original registration number


      Your vehicle must have 8 or more points from the table below if you want to keep the original registration number. 5 of these points must come from having the original or new and unmodified chassis, monocoque bodyshell or frame.
      Chassis, monocoque bodyshell (body and chassis as one unit) or frame - original or new and unmodified (direct from manufacturer) 5
      Suspension (front and back) - original 2
      Axles (both) - original 2
      Transmission - original 2
      Steering assembly - original 2
      Engine - original 1
      Get a ‘Q’ registration number


      You won’t be able to keep your vehicle’s original registration number if one of the following applies:
      • it has fewer than 8 points
      • it has a second-hand or altered chassis, monocoque bodyshell or frame
      • there’s evidence that 2 vehicles have been welded together to form one (ie ‘cut and shut’)

      Your vehicle must pass the relevant type approval test to get a ‘Q’ prefix registration number.

      edited to add

      further conflicting advice re MOT excemption
      https://www.gov.uk/historic-vehicles
      Historic (classic) vehicles: MOT and vehicle tax

      Contents
      1. Eligibility
      2. Vehicles exempt from vehicle tax
      3. Apply for a vehicle tax exemption
      4. Renewing your vehicle tax
      Eligibility


      The date your vehicle was built affects whether you need to:Date the vehicle was built

      1 January 1960 to 31 December 1977


      You must get an MOT, but don’t have to pay vehicle tax. What you have to do


      You must apply for a vehicle tax exemption to stop paying vehicle tax. This is sometimes called putting a vehicle into the ‘historic tax class’.

      You don’t have to apply to stop getting an MOT for your vehicle each year. However, you must still keep it in a roadworthy condition.

      You can be fined up to £2,500 and get 3 penalty points for using a vehicle in a dangerous condition.



      edited to add, edited to add, no conflict about mot exemption as it doesnt come in till 20 May
      Last edited by richardthestag; 16th May 2018, 17:21.
      Stags and Range Rover Classics - I must be a loony

      Comment


        #4
        Onto Vish's question, tricky one...

        I have no issue about jumping into my TV8 stag and taking it on a journey. The car is built for long journeys etc. I built the engine myself, 2nd time round. the first time I was let down by a poor quality crank which although it was only on 10thou big end and main had not been re-hardened. Factory suggests that it shouldnt have been necessary but then was 1970s BL we are talking about eh

        Mine has seen me to Le Mans and back 900mile round trips with very few issues. I have happily thrown nearly 500 miles at it in a day, the seats and my lower back eventually threw in the towel on that one

        Last week it was down to Devon and back 400 mile round trip, again no issues. didnt use a drop of oil or water.

        The only time it ever let me down and failed to get home was when the ignition module failed and I didnt keep a spare unit in the glove box.

        I also run as my daily driver a 25 year old 3.9 Rover v8 engine d Range Rover. I have added over 130,000 miles to that vehicle over the last 11 years or so. the only 2 ftp "failed to proceed" moments were a burnt out starter motor and a dead alternator. Rover v8 puts up with horrific abuse but when it goes it is often in boat anchor territory

        If you are putting the TV8 back in, make sure that you put suspension and brake bias back to standard - unless it was a poor conversion in the first place.
        Stags and Range Rover Classics - I must be a loony

        Comment


          #5
          I have no hesitation in using my Triumph V8 for any length of journey - we've done the Round Britain Reliability Run (2000 miles in a weekend), I've done trips to France, The Netherlands, Germany without worry or problem. The last trip was the Coast To Coast, a total of 800 miles there and back again.
          I don't have any modifications except an electric fan, fitted after a long wait in 30 degrees heat a couple of years ago caused me some anxiety.
          I rarely carry spares or tools. I sometimes remember to check the coolant level and always change the oil every 3,000 miles.

          Richard
          Mabel is a white 1972 Mk1½, TV8, ZF 4HP-22 auto,
          2016 RBRR finisher. 400 mile C2C 21/22 April 2018!

          Comment


            #6
            When my wife was alive and the family were younger, we used to take the Stag, 4 up, with 4/5 berth caravan on the back, into Europe every summer. All over France, sometimes into Germany and Switzerland, once into Italy (Venice, Florence, Pisa, Genoa), once into Spain, ... Occasionally needed a little evening work on a camp-site, but never failed to get us wherever we wanted, and home again.
            The only time it has been unreliable is when it hasn't been used regularly.
            '72 Manual O/d Saffron Yellow

            Comment


              #7
              Wait for the bullets to fly.......If you have a nicely set up Rover powered Stag dont change it for the TV8 they are simply not as robust and you will need to be quite dedicated possibly at times with deep pockets to keep it running nicely. I love my TV8 but its not the most reliable, its only stopped completely once due to water pump failure (go electric pump straight away) but its always got niggles. At the moment I didn't start it for a few months and when i did a valve was stuck hit the piston and bent valve! Not a cheap job, compare that incident alone that is i am told common enough with your Rover V8.

              nothing's a problem though if your a reasonable mechanic with a well equipped home garage and lots of time.....I just described a lot of our friends who are saying go for it!?

              Running for cover!

              nigel

              Comment


                #8
                Originally posted by tonyh View Post
                I would put back a Stag engine. Stags with Rover, Ford V6, Triumph 6 cylinder or any other non Stag engine will not be able to keep there historic status and may be forced to have a Q number plate.

                https://www.duckhams.com/important-c...hicle-history/
                If that happens I'll break mine and sell it for parts
                Your wife is right, size matters. 3.9RV8

                Comment


                  #9
                  I have a heavily altered Stag, Rover engine, Camaro gearbox, Corsa steering system, Wilwood brakes etc, etc, but even I get more than the 8 points needed. Could even put a beemer back end on the car and score the points. Bodyshell axles and suspension gets you the points with 1 to spare.

                  John.
                  Your wife is right, size matters. 3.9RV8

                  Comment


                    #10
                    I think I’n with Nigel,on this one as while I’ve had my Stag for 25 years, I’ve rebuilt the (original) engine twice in that period and the last as a result of H G F brought upon I admit and think by my not checking the head studs etc often enough.
                    I haven’t done wildly long journeys probably 350 miles in a day but apart from the above it has been utterly reliable, runs like a dream and I would never part with it.
                    Having said this, I love the Rover engine (i’ve Owned 2 P6’s with the V8 and and SD1j and I have always felt it a better designed and built unit primarily as it is all alloy and not a mix like the Stag which doesn’t help with the head gasket problems (ally and iron expand at different rates) so if like you I had a Stag with a well sorted Rover unit I would only think of ways (and there are lots) of improving the power output of that unit which on the Stag is very difficult without major mods.

                    Hope this helps!
                    Mike

                    Comment


                      #11
                      Vishnu, if you do go ahead there are questions for your engine builder, is crank tuffened? If so how and by who? If the heads are skimmed has he used thicker head gaskets and before he torque down the heads he needs to align the manifold otherwise your in for it! Budget for the electric or external water pump and a new radiator. The original water pumps not good. So he's put a new oil pump on ? Has he kept the original pressure relief spring?
                      possibly a lot of other questions , TV8 needs a specialist builder like wards really as its full of details only the guys who have specialised really get right.
                      rgds
                      nigel

                      Comment


                        #12
                        If the car is running nicely leave it alone and drive it. Buy another Stag and work on that. Put the Stag engine in when you ready to sell the car. Summer's around the corner enjoy the car.

                        Sujit

                        Comment


                          #13
                          Back to the original question, I have driven mine from Kent, all round Scotland, down through Devon to Cornwall and Lands end and back to Kent in a fortnight - around 2500 miles with no problems. I've been the length of the country several times and over to France on the rare occasion. It hasn't let me down on a long trip yet. If it does break down 9 times out of 10 it is due to something I've fiddled with and not put back correctly! (You soon learn from your mistakes!).

                          Rgds

                          Dave
                          http://www.stagwiki.com | http://parts.stagwiki.com (Under Development)

                          Comment


                            #14
                            "Dad's Stag" broke down when we went on holiday to Scotland from Shropshire. Starter wouldn't engage, I think that's a well known problem by now, this was back in about 1977. A few years later it broke down on mum when a core plug failed and it dropped all the coolant. Other than that, those are the only "breakdowns" that I recall over 42 years.

                            Would I drive it beyond 20 miles from home at the moment? Umm, no because i'm not confident yet about how high the temperature gets on warm days, i've had it nudge too near to the red in traffic and until i'm confident about controlling that, close to home it is.

                            It's still too early in my care for me to know the car.

                            Comment


                              #15
                              Originally posted by jakesmig View Post
                              I have a heavily altered Stag, Rover engine, Camaro gearbox, Corsa steering system, Wilwood brakes etc, etc, but even I get more than the 8 points needed. Could even put a beemer back end on the car and score the points. Bodyshell axles and suspension gets you the points with 1 to spare.

                              John.
                              How easy is it to add a 4 speed gearbox to the rover engine?

                              Comment

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