With gasoline at 17¢ a gallon, and new Ford sedans available for a mere $450, Nina Wilcox Putnam told Post readers there was never a better time to drive to California.

The best bargain on the American market today is a trip across the country, which can now be had for practically the same price as staying at home.

Automobiles in 1931, she reports in her Post article, “What’ll It Cost Me To Drive To the Coast?” have greatly improved over the past ten years. When she first drove from New York to California in 1921—

I carried spare parts enough to make up a second car, including new magneto points, and used every darned one of them before the first California real ­estate salesman was sighted.

The roads are better, too. Back in 1921, she says, you wouldn’t think of driving across the western states without an axe “for chopping brush to get you out of gumbo roads during Missouri rainstorms” and an extra set of suspension springs “because you were practically certain to break a spring on what were playfully nick­named ‘roads’ in Arizona.”

But even in 1931, Porter says, you had better bring  better along a length of strong tow-rope, and a waterbag to hang on the front of the car so you won’t run out of water in the desert.

“And ah, yes, I almost forgot a water­proof tarpaulin. No matter how good the trunk on the back of your car, take it from me you’d better cover it with a tarpaulin. It’s a big square of treated canvas, and it really does prevent dust and moisture from working into the luggage and ruining that one good suit or dress which you’re taking along in case you feel like changing some night at a stylish hotel.

The modern driver of 1931 now has a choice of cross-country routes. Most travelers take the National Road, which runs from Atlantic City to San Francisco, but she recommends a new route between Washington, D.C., and Los Angeles.

If you are sick of cities and want a vacation from them; if you are tired of passing trucks and of being held up by traffic stop lights, let me submit the new Midland Trail. I’ll guarantee you’ll hardly meet a truck, see an advertising sign or lose a moment through traffic sig­nals.

But let’s return to the question in Putnam’s title: just how much does it cost to drive from New York in California in 1931. Before she started, a New York travel agent had told her—

“With a small car it will cost you five cents a mile, including good but not fashion­able hotels, food, gas and oil, and ordi­nary running repairs. We figure it will take you nine days.”

When she reached her destination outside Los Angeles, Putnam found that she had actually spent a little less than the predicted $165.

Before there were motels, travellers stopped overnight at rustic motor camps, whose comfort level can be guessed by the picture above.

That’s a sizeable figure for a year when unemployment had risen to 16% and was continuing to climb. Yet it’s fairly inexpensive for nine days of sightseeing, hotels, and meals.Yet you could take the same trip for much less today.

Adjusted for 80 years of inflation, $1.00 in 1931 has the purchasing power of $14.50 today. So Putnam’s trip cost her the equivalent of $2,392 in 2011 dollars.

Today, the drive from New York to Los Angeles is 500 miles shorter. Using the gas prices of this last week, AAA’s fuelcostcalculator.aaa.com, determines that a new, inexpensive car (comparable to what Putnam drove) would consume $440 in gas. Furthermore, you wouldn’t need nine days to cover that distance. While I’ve known people who drove that distance in a heroic, three-day marathon, I’ll allow a modern driver six days (450 miles/day) and a daily allowance of $80 for hotels and $50 for food.

The total cost would be $1,220. Divide that number by 14.50 to reverse inflation, and the price in 1931 dollars, would be $84.

Even with the price of gasoline so high today, our per-mile cost has dropped from 5¢ to 3¢ in 80 years. This doesn’t even factor in the three days saved by driving modern highways in more dependable cars—and three days is just as valuable in 2011 as in 1931.

The Cross-Country Drive: Cheap In 1931, Cheaper In 2011 The Saturday Evening Post