Sometime later, he drove into the driveway with the somewhat less sensible, but somewhat more exciting, vehicle shown in the appended photos “BD’s Toy 1” and “BD’s Toy 2.”
To his amazement, and continuing delight, his consort, the astounding Diane half of BrianDiane (aka sagelily) applauded his choice. How does a nerdly engineer get so lucky???
To commemorate these amazing unions (B+D and B+car), I’ve placed a cache at a location computed by multiplying the car’s serial number (3A4B5C6D) by the average of the valve clearances in mm. at the car’s last tune-up (0.238619775).
Brian’s car is now A years old, given that it was produced in the fall of the third year of the series’ production run.
This cultivated beast has B cylinders with a total displacement of C litres fuelled via D carburetors.
You can check your answers for this puzzle on GeoChecker.com.