which is faster

70 225 slant six or 77 302 v8

depends on what its in but the 302 will most likely out run the Slant.

the 1970 225 slant six has more horsepower than the 302

Doesnt mean it will be faster. If that slant 6 is pushing a 3500lb B-body or even a 3200lb A body and the 302 is in a 2800lb Mustang or 2600lb maverick it will win.

Its power to weight ratio, not just power.

the 1970 225 slant six has more horsepower than the 302

In 1970 horsepower was measured differently than it was after 72. Your slant 6 has 100 HP when measured the way the 77 302 v8 was measured and is the number advertised for the slant starting in 72.

In 1970 horsepower was measured differently than it was after 72. Your slant 6 has 100 HP when measured the way the 77 302 v8 was measured and is the number advertised for the slant starting in 72.

so why would they change it? makes almost no sence

Insurance companies !!

i hope no one here works for and insurance company.. because they are all deuche bags.. ALL OF THEM... DEUCHES OF BAGS I SAY!!!!


muuahahahaaha

so why would they change it? makes almost no sence

Because the manufacturers were running tests that were not standardized. One companies 300 HP was not the same as the next's 300HP. For example the slant being rated 145 HP but actually only making 100 HP as installed in a car.

The insurance company game was to pick a point on the power curve below peak and advertise that. For instances saying an engine was rated 300HP @ 4500 rpm which was a true statement but in actuality peak was 350HP @5500 rpm. In 72 this practice was stopped. The insurance companies had no direct involvement in the horsepower ratings other than having higher rates for higher horsepower ratings and likely lobbied the government for standardized testing along with the consumer groups that wanted it too.

In general before 72 the engines did not have air cleaners on them, the engine was not turning a water pump, no alternator and the exhaust was what ever they wanted to use. The government mandated test methods starting in 72 required the use of all accessories so the engine had to have the air cleaner, water pump, alternator, stock exhaust, etc.

Starting this year the government has further refined the testing methods being used. From what I have read the Japanese & European manufacturers cars will go down a little and US will go up a little with this new system.

I thought it was that before 1972 they were rating the engines by the HP it made at the engine. And to meet insurance regulations after 72, they were rating the HP at the rear wheels. Makes insurance a lot cheaper

I don't think anybodys insurance went down at the start of the 1972 model year just because they rated them differently. I believe it was like other people have said to be more accurate in the hp ratings as installed with all accessories.

I thought it was that before 1972 they were rating the engines by the HP it made at the engine. And to meet insurance regulations after 72, they were rating the HP at the rear wheels. Makes insurance a lot cheaper

None of the manufactures rated HP at the wheels and still don't. The terminology was Gross prior to 72 and NET after. Those terms refered to the HP produced by the engine with nothing being absorbed by accessories like fans, water pumps, alternters (GROSS) and with all the normal accessories absorbing HP (NET).

I am quite surprised that people have voted that the Slant would be faster than a 302 V8. The slant is a rugged engine and makes a fair amount of torque for it's size but it certainly can't be put in the same class as a 302. If the poll was which would be faster a 318 or a 302 that would be a more equivalent comparison. A 78 318 is rated at 140HP

makes sense. I am not sure if this was something I heard or just thought up a while back on my own and just went with it.

this is a poll?

I once owned a 22 thousand mile slant 6, 3-speed man,1974 Duster. I took it to the strip to blow it up. The best it ran was 21.50 in the 1/4. I don't care who you are, thats slow! Oh yea, it didn't blow up.

the last I read in the mid 90s there was a 225 slant 6 runnin9.50 1/4 miles. this car is in mopar performance mag dated I believe in 1995

the last I read in the mid 90s there was a 225 slant 6 runnin9.50 1/4 miles. this car is in mopar performance mag dated I believe in 1995

last summer i ran my 1968 barracuda with 225 slant six from zero to sixty at 10 or 11 seconds

I plan to later this summer get a 340

I've driven a 1970 Duster with a 225 slant 6, and owned a 77 or 78 Mustang II Cobra with a 302. The 302 would of beat the 225 easily. The 225 is still a great motor though. They will run forever.