Hi,

I'm not of the 140-160 era or the "D" Motronic system and only can speak of the K-jet and LH Bosch fuel management systems.
This is all called "Evolution."

The K-jet is the more mechanical one over the LH one that came on board in the USA around 1983 with the addition of turbo charging.
The K- jet used the oxygen sensor and a frequency variable, electrical pulse valve, of which, was controlled by an ECU built around the exhaust emissions input signal.
The LH was the further enhancement of the Lambda combustion control system that started, in the USA, around the 1977-78 240 years?

The frequency valve was replaced by, the common thing, for today, called fuel injectors!
The K-jet used pressure and flow injectors, of which, the fuel pressure and air flow, was controlled by temperature dependent mechanisms and mechanical calibrated components.

One has to remember or "realize" that many things were in flux in the Seventies, with the onset of getting better mileage and the rest of the non-Volvo world downsizing. Gas guzzlers or land yachts, as they are called today!
Turbos were brought to the motoring public, to keep those with behemoth sized engines, into car buying!
If they still wanted, to afford or feel their right foot kick their heads back or even to just keep up!
The engines also lasted longer for the average consumer and a bonus was being able to maneuver around the "railroad box cars" to the next traffic light!
This whole affair lead to the non sense of "rice rockets" (motorcycles) and high revving, tire burning circle makers of today's generation!
Things do change and electric is on the way!

The future, looks to bring us some transportation innovations and more mindset changing criteria!
Intelligence and stupidity will always be in a swirl around us, as I guess, it's in our DNA to keep us from getting too bored with each other!
Even Harley Davidison named their first major change in engines an "Evolution" that was designed in cooperation, by Porsche!
Before that, HD use to checked with the Smithsonian Institute to do that!

Now HD has an Electronically Controlled, "Electric powered" Motorcycle.
That is, if you have enough "Change" in your pocket!
$30,000! Complete with uncontrolled options like heating or air conditioning?


Phil